{
  "age_15": {
    "display": "15",
    "estimand": "age below which WONDER's under-15 band applies; mothers under this age are left out (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 15,
    "weights": "none (definition)"
  },
  "age_25": {
    "display": "25",
    "estimand": "age from which births rise in the largest-gain counties (a definition of the band boundary used in the figure title)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 25,
    "weights": "none (definition)"
  },
  "age_35": {
    "display": "35",
    "estimand": "age below which a mother belongs to the younger groups in this chapter (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 35,
    "weights": "none (definition)"
  },
  "age_45": {
    "display": "45",
    "estimand": "age at which WONDER's 45-to-49 band begins; mothers of this age and older are left out (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 45,
    "weights": "none (definition)"
  },
  "band_1519": {
    "display": "15 to 19",
    "estimand": "age-of-mother range used in this chapter, from WONDER's five-year bands (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 15,
    "weights": "none (definition)"
  },
  "band_1524": {
    "display": "15 to 24",
    "estimand": "age-of-mother range used in this chapter, from WONDER's five-year bands (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 15,
    "weights": "none (definition)"
  },
  "band_1529": {
    "display": "15 to 29",
    "estimand": "age-of-mother range used in this chapter, from WONDER's five-year bands (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 15,
    "weights": "none (definition)"
  },
  "band_1544": {
    "display": "15 to 44",
    "estimand": "age-of-mother range used in this chapter, from WONDER's five-year bands (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 15,
    "weights": "none (definition)"
  },
  "band_2024": {
    "display": "20 to 24",
    "estimand": "age-of-mother range used in this chapter, from WONDER's five-year bands (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 20,
    "weights": "none (definition)"
  },
  "band_2529": {
    "display": "25 to 29",
    "estimand": "age-of-mother range used in this chapter, from WONDER's five-year bands (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 25,
    "weights": "none (definition)"
  },
  "band_3034": {
    "display": "30 to 34",
    "estimand": "age-of-mother range used in this chapter, from WONDER's five-year bands (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 30,
    "weights": "none (definition)"
  },
  "band_3539": {
    "display": "35 to 39",
    "estimand": "age-of-mother range used in this chapter, from WONDER's five-year bands (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 35,
    "weights": "none (definition)"
  },
  "band_3544": {
    "display": "35 to 44",
    "estimand": "age-of-mother range used in this chapter, from WONDER's five-year bands (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 35,
    "weights": "none (definition)"
  },
  "band_4044": {
    "display": "40 to 44",
    "estimand": "age-of-mother range used in this chapter, from WONDER's five-year bands (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "mothers",
    "source": "wonder-natality",
    "unit": "years of age",
    "value": 40,
    "weights": "none (definition)"
  },
  "births_named_2018": {
    "display": "3.02 million",
    "estimand": "count of live births",
    "note": "",
    "period": "2018",
    "population": "live births in the counties that CDC WONDER natality identifies in every year (counties with 100,000 or more residents in the population vintage WONDER uses)",
    "source": "wonder-natality",
    "unit": "live births",
    "value": 3020813,
    "weights": "none (full count)"
  },
  "births_named_2024": {
    "display": "2.88 million",
    "estimand": "count of live births",
    "note": "",
    "period": "2024",
    "population": "live births in the counties that CDC WONDER natality identifies in every year (counties with 100,000 or more residents in the population vintage WONDER uses)",
    "source": "wonder-natality",
    "unit": "live births",
    "value": 2881385,
    "weights": "none (full count)"
  },
  "births_pooled_2018": {
    "display": "0.77 million",
    "estimand": "count of live births in the pooled rows",
    "note": "",
    "period": "2018",
    "population": "live births in the counties that WONDER natality does not name, which it pools within each state",
    "source": "wonder-natality",
    "unit": "live births",
    "value": 770899,
    "weights": "none (full count)"
  },
  "births_pooled_2024": {
    "display": "0.75 million",
    "estimand": "count of live births in the pooled rows",
    "note": "",
    "period": "2024",
    "population": "live births in the counties that WONDER natality does not name, which it pools within each state",
    "source": "wonder-natality",
    "unit": "live births",
    "value": 747549,
    "weights": "none (full count)"
  },
  "births_published_cells": {
    "display": "20.4 million",
    "estimand": "count of births in published cells",
    "n": 20431379,
    "nUnit": "births",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "live births in the published age-of-mother cells of the named counties",
    "source": "wonder-natality",
    "unit": "live births",
    "value": 20431379,
    "weights": "none (full count)"
  },
  "bottom_tenth_cut": {
    "display": "13.6%",
    "estimand": "fall at the 10th percentile of the county changes in births",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 13.581,
    "weights": "none (full count)"
  },
  "bottom_tenth_n": {
    "display": "58",
    "estimand": "count of counties at or below the 10th percentile of change",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties in the bottom tenth of change in births",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 58,
    "weights": "none (full count)"
  },
  "bottom_tenth_south": {
    "display": "13",
    "estimand": "count of those counties in the Census South region (16 states and DC)",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties in the bottom tenth of change that are in the Census South region",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 13,
    "weights": "none (full count)"
  },
  "change_2021_q4": {
    "ci": [
      -0.8,
      0.1
    ],
    "ciLevel": 0.95,
    "display": "−0.3%",
    "estimand": "pooled change in the count of births from 2020 to 2021, bootstrap interval over counties",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "2020 to 2021",
    "population": "live births in the most deprived quartile of the named counties by county Area Deprivation Index rank",
    "source": "wonder-natality",
    "unit": "percent of 2020 births",
    "value": -0.327978,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "chg_3034": {
    "ci": [
      -0.6,
      2.6
    ],
    "ciLevel": 0.95,
    "display": "+1.0%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 30 to 34 in the named counties that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 1.02143,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "core_cells": {
    "display": "24,276",
    "estimand": "count of cells",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "county-year-by-age cells for mothers aged 15 to 44 in the named counties",
    "source": "wonder-natality",
    "unit": "cells",
    "value": 24276,
    "weights": "none (full count)"
  },
  "core_withheld_cells": {
    "display": "11",
    "estimand": "count of cells with 1 to 9 births, which WONDER withholds",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "county-year-by-age cells for mothers aged 15 to 44 in the named counties",
    "source": "wonder-natality",
    "unit": "cells",
    "value": 11,
    "weights": "none (full count)"
  },
  "core_withheld_max_births": {
    "display": "99",
    "estimand": "largest number of births the withheld cells could hold: 9 births in each",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "withheld cells for mothers aged 15 to 44",
    "source": "wonder-natality",
    "unit": "live births",
    "value": 99,
    "weights": "none (full count)"
  },
  "counties_declined": {
    "display": "380",
    "estimand": "count of counties with fewer births in 2024 than in 2018",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 380,
    "weights": "none (full count)"
  },
  "counties_rose": {
    "display": "197",
    "estimand": "count of counties with more births in 2024 than in 2018",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 197,
    "weights": "none (full count)"
  },
  "counties_unchanged": {
    "display": "one",
    "estimand": "count of counties with the same number of births in 2018 and 2024",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 1,
    "weights": "none (full count)"
  },
  "counties_used": {
    "display": "578",
    "estimand": "count of counties",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "counties that WONDER natality identifies in every year from 2018 to 2024 and that have births",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 578,
    "weights": "none (full count)"
  },
  "county_median_decline": {
    "display": "3.8%",
    "estimand": "median of the county changes in births, one county one count",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "the median named county",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 3.7623,
    "weights": "none (full count)"
  },
  "county_p5_decline": {
    "display": "16.5%",
    "estimand": "5th percentile of the county changes in births",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties at the 5th percentile of change",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 16.4797,
    "weights": "none (full count)"
  },
  "county_p95_gain": {
    "display": "19.9%",
    "estimand": "95th percentile of the county changes in births",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties at the 95th percentile of change",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 19.8741,
    "weights": "none (full count)"
  },
  "decline_2020": {
    "display": "4.8%",
    "estimand": "fall in the count of births from 2018 to 2020",
    "note": "",
    "period": "2018 to 2020",
    "population": "live births in the counties that CDC WONDER natality identifies in every year (counties with 100,000 or more residents in the population vintage WONDER uses)",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 4.82125,
    "weights": "none (full count)"
  },
  "decline_2023": {
    "display": "5.5%",
    "estimand": "fall in the count of births from 2018 to 2023",
    "note": "",
    "period": "2018 to 2023",
    "population": "live births in the counties that CDC WONDER natality identifies in every year (counties with 100,000 or more residents in the population vintage WONDER uses)",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 5.48783,
    "weights": "none (full count)"
  },
  "decline_mid": {
    "ci": [
      1.1,
      4.5
    ],
    "ciLevel": 0.95,
    "display": "2.8%",
    "estimand": "fall in the pooled count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 289,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the second and third quartiles together of the named counties by county Area Deprivation Index rank",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 2.83447,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "decline_named": {
    "display": "4.6%",
    "estimand": "fall in the count of births from 2018 to 2024",
    "note": "",
    "period": "2018 to 2024",
    "population": "live births in the counties that CDC WONDER natality identifies in every year (counties with 100,000 or more residents in the population vintage WONDER uses)",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 4.61558,
    "weights": "none (full count)"
  },
  "decline_pooled": {
    "display": "3.0%",
    "estimand": "fall in the count of births in the pooled rows from 2018 to 2024",
    "note": "",
    "period": "2018 to 2024",
    "population": "live births in the counties that WONDER natality does not name, which it pools within each state",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 3.02893,
    "weights": "none (full count)"
  },
  "decline_q1": {
    "ci": [
      2.8,
      8.2
    ],
    "ciLevel": 0.95,
    "display": "5.6%",
    "estimand": "fall in the pooled count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the least deprived quartile of the named counties by county Area Deprivation Index rank",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 5.56875,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "decline_q2": {
    "ci": [
      -0.6,
      5.3
    ],
    "ciLevel": 0.95,
    "display": "2.6%",
    "estimand": "fall in the pooled count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the second quartile of the named counties by county Area Deprivation Index rank",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 2.56366,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "decline_q3": {
    "ci": [
      1.6,
      4.5
    ],
    "ciLevel": 0.95,
    "display": "3.1%",
    "estimand": "fall in the pooled count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the third quartile of the named counties by county Area Deprivation Index rank",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 3.13987,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "decline_q4": {
    "ci": [
      5.8,
      8.8
    ],
    "ciLevel": 0.95,
    "display": "7.3%",
    "estimand": "fall in the pooled count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the most deprived quartile of the named counties by county Area Deprivation Index rank",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 7.29771,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "decline_us": {
    "display": "4.3%",
    "estimand": "fall in the count of births from 2018 to 2024",
    "note": "",
    "period": "2018 to 2024",
    "population": "live births in the 50 states and DC",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 4.29299,
    "weights": "none (full count)"
  },
  "empty_shells": {
    "display": "two",
    "estimand": "count of listed counties whose births WONDER folded into the state's pooled row",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "county identifiers that WONDER lists in every year from 2018 to 2024 but with no births (Cape May County NJ, Portsmouth city VA)",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 2,
    "weights": "none (full count)"
  },
  "ext_min_births": {
    "display": "987",
    "estimand": "smallest 2018 count of births among those counties",
    "n": 20,
    "nUnit": "counties",
    "note": "",
    "period": "2018",
    "population": "the 20 counties in the figure of largest gains and declines",
    "source": "wonder-natality",
    "unit": "live births",
    "value": 987,
    "weights": "none (full count)"
  },
  "ext_n": {
    "display": "ten",
    "estimand": "number of counties listed in each group of largest gains and largest declines (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 10,
    "weights": "none (definition)"
  },
  "fall_1519": {
    "ci": [
      22.7,
      26.5
    ],
    "ciLevel": 0.95,
    "display": "24.6%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 577,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 19 in the named counties that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 24.6499,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "fall_2024": {
    "ci": [
      15,
      18.3
    ],
    "ciLevel": 0.95,
    "display": "16.6%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 20 to 24 in the named counties that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 16.6452,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "fall_2529": {
    "ci": [
      9.6,
      12.9
    ],
    "ciLevel": 0.95,
    "display": "11.2%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 25 to 29 in the named counties that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 11.1851,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "fall_share_young": {
    "ci": [
      2.9,
      3.3
    ],
    "ciLevel": 0.95,
    "display": "3.1 percentage points",
    "estimand": "change from 2018 to 2024 in the pooled share of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually, births in published cells; mothers aged 15 to 24",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 3.1055,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "fall_young_diff": {
    "ci": [
      0.9,
      2.2
    ],
    "ciLevel": 0.95,
    "display": "1.5 percentage points",
    "estimand": "difference of two changes in pooled shares: fall in the share of births to mothers aged 15 to 24, most deprived quartile minus least deprived quartile, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 1.52713,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "fall_young_q1": {
    "ci": [
      1.9,
      3
    ],
    "ciLevel": 0.95,
    "display": "2.5 percentage points",
    "estimand": "change from 2018 to 2024 in the pooled share of births, shared bootstrap draws over counties",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually; mothers aged 15 to 24; least deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 2.50074,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "fall_young_q4": {
    "ci": [
      3.7,
      4.4
    ],
    "ciLevel": 0.95,
    "display": "4.0 percentage points",
    "estimand": "change from 2018 to 2024 in the pooled share of births, shared bootstrap draws over counties",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually; mothers aged 15 to 24; most deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 4.02787,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "g1_chg_3539": {
    "display": "−0.1%",
    "estimand": "pooled change in the count of births from 2018 to 2024",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 35 to 39 in the quarter of named counties with the largest declines that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": -0.0633826,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "g1_fall_1519": {
    "display": "32.9%",
    "estimand": "pooled change in the count of births from 2018 to 2024",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 19 in the quarter of named counties with the largest declines that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 32.8697,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "g1_fall_2024": {
    "display": "25.1%",
    "estimand": "pooled change in the count of births from 2018 to 2024",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 20 to 24 in the quarter of named counties with the largest declines that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 25.0871,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "g1_fall_2529": {
    "display": "21.1%",
    "estimand": "pooled change in the count of births from 2018 to 2024",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 25 to 29 in the quarter of named counties with the largest declines that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 21.1095,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "g1_fall_3034": {
    "display": "8.8%",
    "estimand": "pooled change in the count of births from 2018 to 2024",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 30 to 34 in the quarter of named counties with the largest declines that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 8.77431,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "g1_rise_4044": {
    "display": "9.6%",
    "estimand": "pooled change in the count of births from 2018 to 2024",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 40 to 44 in the quarter of named counties with the largest declines that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 9.55125,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "g4_fall_1519": {
    "display": "13.0%",
    "estimand": "pooled change in the count of births from 2018 to 2024",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 19 in the quarter of named counties with the largest gains that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 12.9711,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "g4_fall_2024": {
    "display": "4.0%",
    "estimand": "pooled change in the count of births from 2018 to 2024",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 20 to 24 in the quarter of named counties with the largest gains that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 4.04723,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "g4_rise_2529": {
    "display": "5.8%",
    "estimand": "pooled change in the count of births from 2018 to 2024",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 25 to 29 in the quarter of named counties with the largest gains that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 5.79627,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "g4_rise_4044": {
    "display": "39.3%",
    "estimand": "pooled change in the count of births from 2018 to 2024",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 40 to 44 in the quarter of named counties with the largest gains that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 39.2609,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "gap_2021_q1": {
    "ci": [
      1,
      3
    ],
    "ciLevel": 0.95,
    "display": "1.9 percentage points",
    "estimand": "difference of two pooled changes in the count of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2020 to 2021",
    "population": "live births in the named counties, change from 2020 to 2021 in the least deprived quartile minus the change in the most deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 1.91295,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "gap_2021_q2": {
    "ci": [
      1.4,
      3.6
    ],
    "ciLevel": 0.95,
    "display": "2.5 percentage points",
    "estimand": "difference of two pooled changes in the count of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2020 to 2021",
    "population": "live births in the named counties, change from 2020 to 2021 in the second quartile minus the change in the most deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 2.54195,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "gap_2021_q3": {
    "ci": [
      0.5,
      2.2
    ],
    "ciLevel": 0.95,
    "display": "1.3 percentage points",
    "estimand": "difference of two pooled changes in the count of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2020 to 2021",
    "population": "live births in the named counties, change from 2020 to 2021 in the third quartile minus the change in the most deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 1.30018,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "gap_older_2018": {
    "ci": [
      10,
      12.5
    ],
    "ciLevel": 0.95,
    "display": "11.3 percentage points",
    "estimand": "difference of two pooled shares of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2018",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually; mothers aged 35 to 44; least deprived quartile minus most deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 11.3046,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "gap_older_2024": {
    "ci": [
      10.5,
      13.5
    ],
    "ciLevel": 0.95,
    "display": "12.0 percentage points",
    "estimand": "difference of two pooled shares of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually; mothers aged 35 to 44; least deprived quartile minus most deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 12.0437,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "gap_young_2018": {
    "ci": [
      12.3,
      15.8
    ],
    "ciLevel": 0.95,
    "display": "14.0 percentage points",
    "estimand": "difference of two pooled shares of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2018",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually; mothers aged 15 to 24; most deprived quartile minus least deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 13.9761,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "gap_young_2024": {
    "ci": [
      11,
      14
    ],
    "ciLevel": 0.95,
    "display": "12.4 percentage points",
    "estimand": "difference of two pooled shares of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually; mothers aged 15 to 24; most deprived quartile minus least deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 12.449,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "group_cut_decline": {
    "display": "8.8%",
    "estimand": "smallest fall among the counties in the largest-decline quarter (the group's own boundary member)",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "the quarter of named counties with the largest declines",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 8.75883,
    "weights": "none (full count)"
  },
  "group_cut_gain": {
    "display": "2.6%",
    "estimand": "smallest gain among the counties in the largest-gain quarter (the group's own boundary member)",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "the quarter of named counties with the largest gains",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 2.60191,
    "weights": "none (full count)"
  },
  "group_n_largest_declines": {
    "display": "144",
    "estimand": "count of counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties in the quarter with the largest declines in births",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 144,
    "weights": "none (full count)"
  },
  "group_n_largest_gains": {
    "display": "145",
    "estimand": "count of counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties in the quarter with the largest gains in births",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 145,
    "weights": "none (full count)"
  },
  "group_total_decline": {
    "display": "13.5%",
    "estimand": "fall in the pooled count of births from 2018 to 2024",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the quarter of named counties with the largest declines",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 13.4891,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "group_total_gain": {
    "display": "11.2%",
    "estimand": "rise in the pooled count of births from 2018 to 2024",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the quarter of named counties with the largest gains",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 11.2063,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "largest_decline": {
    "display": "23.9%",
    "estimand": "fall in the county's count of births from 2018 to 2024",
    "n": 4127,
    "nUnit": "births",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "the named county with the largest decline (St. Louis city, MO)",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 23.8672,
    "weights": "none (full count)"
  },
  "largest_gain": {
    "display": "67.6%",
    "estimand": "rise in the county's count of births from 2018 to 2024",
    "n": 1786,
    "nUnit": "births",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "the named county with the largest gain (Kaufman County, TX)",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 67.5812,
    "weights": "none (full count)"
  },
  "map_beyond_key": {
    "display": "34",
    "estimand": "count of counties with a change of more than the key limit in either direction",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties whose change is beyond the end of the map key",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 34,
    "weights": "none (full count)"
  },
  "map_key_limit": {
    "display": "20",
    "estimand": "change in births at which the map key ends, in each direction (a display choice)",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties on the map",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 20,
    "weights": "none (full count)"
  },
  "min_county_births": {
    "display": "613",
    "estimand": "smallest annual count of births in any of the named counties",
    "n": 4046,
    "nUnit": "county-years",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "the named county-year with the fewest births",
    "source": "wonder-natality",
    "unit": "live births",
    "value": 613,
    "weights": "none (full count)"
  },
  "named_below_threshold": {
    "display": "one",
    "estimand": "count of named counties with a 2020 Census population below the threshold",
    "n": 3135,
    "nUnit": "counties",
    "note": "",
    "period": "2020 Census",
    "population": "named counties outside Connecticut whose 2020 Census population is below the threshold",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 1,
    "weights": "none (full count)"
  },
  "pctl_5": {
    "display": "5th",
    "estimand": "percentile used to describe the spread of county changes (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "percentile",
    "value": 5,
    "weights": "none (definition)"
  },
  "pctl_95": {
    "display": "95th",
    "estimand": "percentile used to describe the spread of county changes (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "percentile",
    "value": 95,
    "weights": "none (definition)"
  },
  "pooled_above_threshold": {
    "display": "27",
    "estimand": "count of unnamed counties with a 2020 Census population of at least the threshold",
    "n": 3135,
    "nUnit": "counties",
    "note": "",
    "period": "2020 Census",
    "population": "counties outside Connecticut that WONDER pools although their 2020 Census population is 100,000 or more",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 27,
    "weights": "none (full count)"
  },
  "pooled_rows": {
    "display": "49",
    "estimand": "count of pooled rows",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "states with counties below the threshold, each with one pooled Unidentified Counties row",
    "source": "wonder-natality",
    "unit": "states",
    "value": 49,
    "weights": "none (full count)"
  },
  "q1_south_share": {
    "display": "24%",
    "estimand": "share in the Census South region (16 states and DC)",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "counties in the least deprived quartile of the named counties",
    "source": "wonder-natality",
    "unit": "percent of counties",
    "value": 24.3056,
    "weights": "none (full count)"
  },
  "q1_vs_mid_pp": {
    "ci": [
      -0.5,
      5.9
    ],
    "ciLevel": 0.95,
    "display": "2.7 percentage points",
    "estimand": "difference of two pooled falls in the count of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties, fall in births for the least deprived quartile minus the second and third quartiles together",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 2.73428,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "q4_midwest": {
    "ci": [
      6.3,
      11.6
    ],
    "ciLevel": 0.95,
    "display": "9.2%",
    "estimand": "fall in the pooled count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 53,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the most deprived quartile of the named counties in the Census Midwest region",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 9.19983,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "q4_northeast": {
    "ci": [
      6.6,
      11.8
    ],
    "ciLevel": 0.95,
    "display": "9.3%",
    "estimand": "fall in the pooled count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 22,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the most deprived quartile of the named counties in the Census Northeast region",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 9.25649,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "q4_south": {
    "ci": [
      2.9,
      7
    ],
    "ciLevel": 0.95,
    "display": "5.0%",
    "estimand": "fall in the pooled count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 65,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the most deprived quartile of the named counties in the Census South region",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 5.02379,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "q4_south_share": {
    "display": "45%",
    "estimand": "share in the Census South region (16 states and DC)",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "counties in the most deprived quartile of the named counties",
    "source": "wonder-natality",
    "unit": "percent of counties",
    "value": 44.8276,
    "weights": "none (full count)"
  },
  "q4_vs_mid_pp": {
    "ci": [
      2.3,
      6.7
    ],
    "ciLevel": 0.95,
    "display": "4.5 percentage points",
    "estimand": "difference of two pooled falls in the count of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties, fall in births for the most deprived quartile minus the second and third quartiles together",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 4.46324,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "q4_vs_q1_pp": {
    "ci": [
      -1.2,
      5
    ],
    "ciLevel": 0.95,
    "display": "1.7 percentage points",
    "estimand": "difference of two pooled falls in the count of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties, fall in births for the most deprived quartile minus the least deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 1.72896,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "q4_west": {
    "display": "9.3%",
    "estimand": "fall in the pooled count of births from 2018 to 2024; no interval, because the cell holds fewer than 10 counties (all of them lost births)",
    "n": 5,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the most deprived quartile of the named counties in the Census West region",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 9.26531,
    "weights": "births (a pooled ratio of totals over counties; full counts)"
  },
  "q4_west_n": {
    "display": "5",
    "estimand": "count of counties",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "counties in the most deprived quartile of the named counties in the Census West region",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 5,
    "weights": "none (full count)"
  },
  "region_midwest": {
    "ci": [
      -10.4,
      -6.3
    ],
    "ciLevel": 0.95,
    "display": "−8.4%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 137,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties in the Census Midwest region",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": -8.40883,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "region_northeast": {
    "ci": [
      -7.3,
      -2.5
    ],
    "ciLevel": 0.95,
    "display": "−5.0%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 110,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties in the Census Northeast region",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": -5.03963,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "region_south": {
    "ci": [
      -1.7,
      1.8
    ],
    "ciLevel": 0.95,
    "display": "0.0%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 232,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties in the Census South region",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": -0.0490293,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "region_west": {
    "ci": [
      -10.7,
      -5
    ],
    "ciLevel": 0.95,
    "display": "−7.9%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 99,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties in the Census West region",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": -7.93134,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "rise_2024": {
    "display": "0.9%",
    "estimand": "rise in the count of births from 2023 to 2024",
    "note": "",
    "period": "2023 to 2024",
    "population": "live births in the counties that CDC WONDER natality identifies in every year (counties with 100,000 or more residents in the population vintage WONDER uses)",
    "source": "wonder-natality",
    "unit": "percent of 2023 births",
    "value": 0.922896,
    "weights": "none (full count)"
  },
  "rise_3539": {
    "ci": [
      7.3,
      11
    ],
    "ciLevel": 0.95,
    "display": "9.2%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 35 to 39 in the named counties that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 9.1552,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "rise_4044": {
    "ci": [
      17,
      22.3
    ],
    "ciLevel": 0.95,
    "display": "19.5%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 40 to 44 in the named counties that publish the band in both years",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 19.4652,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "rise_older_diff": {
    "ci": [
      0.3,
      1.2
    ],
    "ciLevel": 0.95,
    "display": "0.7 percentage points",
    "estimand": "difference of two changes in pooled shares: rise in the share of births to mothers aged 35 to 44, least deprived quartile minus most deprived quartile, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 0.739046,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "rise_older_q1": {
    "ci": [
      3.1,
      3.9
    ],
    "ciLevel": 0.95,
    "display": "3.5 percentage points",
    "estimand": "change from 2018 to 2024 in the pooled share of births, shared bootstrap draws over counties",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually; mothers aged 35 to 44; least deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 3.51764,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "rise_older_q4": {
    "ci": [
      2.5,
      3.1
    ],
    "ciLevel": 0.95,
    "display": "2.8 percentage points",
    "estimand": "change from 2018 to 2024 in the pooled share of births, shared bootstrap draws over counties",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually; mothers aged 35 to 44; most deprived quartile",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 2.7786,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "rise_share_older": {
    "ci": [
      3.1,
      3.4
    ],
    "ciLevel": 0.95,
    "display": "3.2 percentage points",
    "estimand": "change from 2018 to 2024 in the pooled share of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually, births in published cells; mothers aged 35 to 44",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 3.22879,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_declined": {
    "display": "65.7%",
    "estimand": "share of counties with fewer births in 2024 than in 2018",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "percent of named counties",
    "value": 65.7439,
    "weights": "none (full count)"
  },
  "share_named_2018": {
    "display": "79.7%",
    "estimand": "share of births in the named counties",
    "note": "",
    "period": "2018",
    "population": "live births in the 50 states and DC",
    "source": "wonder-natality",
    "unit": "percent of live births in the United States",
    "value": 79.6688,
    "weights": "none (full count)"
  },
  "share_named_2024": {
    "display": "79.4%",
    "estimand": "share of births in the named counties",
    "note": "",
    "period": "2024",
    "population": "live births in the 50 states and DC",
    "source": "wonder-natality",
    "unit": "percent of live births in the United States",
    "value": 79.4003,
    "weights": "none (full count)"
  },
  "share_older_2018": {
    "ci": [
      18.9,
      20.5
    ],
    "ciLevel": 0.95,
    "display": "19.7%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2018",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually, births in published cells; mothers aged 35 to 44",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 19.7203,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_older_2024": {
    "ci": [
      22.1,
      23.8
    ],
    "ciLevel": 0.95,
    "display": "22.9%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually, births in published cells; mothers aged 35 to 44",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 22.9491,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_older_q1_2018": {
    "ci": [
      23.1,
      25.5
    ],
    "ciLevel": 0.95,
    "display": "24.3%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "2018",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually in the least deprived quartile of counties by deprivation rank, mothers aged 35 to 44",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 24.3179,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_older_q1_2024": {
    "ci": [
      26.4,
      29.2
    ],
    "ciLevel": 0.95,
    "display": "27.8%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually in the least deprived quartile of counties by deprivation rank, mothers aged 35 to 44",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 27.8355,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_older_q4_2018": {
    "ci": [
      12.5,
      13.5
    ],
    "ciLevel": 0.95,
    "display": "13.0%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "2018",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually in the most deprived quartile of counties by deprivation rank, mothers aged 35 to 44",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 13.0132,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_older_q4_2024": {
    "ci": [
      15.1,
      16.5
    ],
    "ciLevel": 0.95,
    "display": "15.8%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually in the most deprived quartile of counties by deprivation rank, mothers aged 35 to 44",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 15.7918,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_young_2018": {
    "ci": [
      21,
      22.7
    ],
    "ciLevel": 0.95,
    "display": "21.8%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2018",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually, births in published cells; mothers aged 15 to 24",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 21.8329,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_young_2024": {
    "ci": [
      18,
      19.5
    ],
    "ciLevel": 0.95,
    "display": "18.7%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually, births in published cells; mothers aged 15 to 24",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 18.7274,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_young_q1_2018": {
    "ci": [
      15.6,
      18.3
    ],
    "ciLevel": 0.95,
    "display": "17.0%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "2018",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually in the least deprived quartile of counties by deprivation rank, mothers aged 15 to 24",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 16.9625,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_young_q1_2024": {
    "ci": [
      13.4,
      15.5
    ],
    "ciLevel": 0.95,
    "display": "14.5%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 144,
    "nUnit": "counties",
    "note": "",
    "period": "2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually in the least deprived quartile of counties by deprivation rank, mothers aged 15 to 24",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 14.4618,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_young_q4_2018": {
    "ci": [
      29.9,
      32.1
    ],
    "ciLevel": 0.95,
    "display": "30.9%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "2018",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually in the most deprived quartile of counties by deprivation rank, mothers aged 15 to 24",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 30.9386,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "share_young_q4_2024": {
    "ci": [
      25.8,
      28
    ],
    "ciLevel": 0.95,
    "display": "26.9%",
    "estimand": "pooled share of births in published cells, bootstrap interval over counties",
    "n": 145,
    "nUnit": "counties",
    "note": "",
    "period": "2024",
    "population": "live births to mothers aged 15 to 44 in the counties that CDC WONDER natality names individually in the most deprived quartile of counties by deprivation rank, mothers aged 15 to 24",
    "source": "wonder-natality",
    "unit": "percent of live births to mothers aged 15 to 44",
    "value": 26.9108,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "slope_u": {
    "ci": [
      -1.1,
      -0.3
    ],
    "ciLevel": 0.95,
    "display": "−0.7 percentage points",
    "estimand": "slope of the county change in births (percent) on county Area Deprivation Index rank, unweighted, one county one count, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "percentage points of change in births per ten points of county deprivation rank",
    "value": -0.704564,
    "weights": "none (each county counts once)"
  },
  "slope_w": {
    "ci": [
      -0.2,
      1.2
    ],
    "ciLevel": 0.95,
    "display": "+0.5 percentage points",
    "estimand": "slope of the county change in births (percent) on county Area Deprivation Index rank, weighted by 2018 births, bootstrap interval over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "percentage points of change in births per ten points of county deprivation rank",
    "value": 0.502222,
    "weights": "2018 births"
  },
  "south_counties": {
    "display": "232",
    "estimand": "count of counties",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "named counties in the Census South region (16 states and DC)",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 232,
    "weights": "none (full count)"
  },
  "south_minus_midwest": {
    "ci": [
      5.7,
      11.1
    ],
    "ciLevel": 0.95,
    "display": "8.4 percentage points",
    "estimand": "difference of two pooled changes in the count of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties, South minus Midwest",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 8.3598,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "south_minus_northeast": {
    "ci": [
      2,
      7.9
    ],
    "ciLevel": 0.95,
    "display": "5.0 percentage points",
    "estimand": "difference of two pooled changes in the count of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties, South minus Northeast",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 4.9906,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "south_minus_west": {
    "ci": [
      4.3,
      11.3
    ],
    "ciLevel": 0.95,
    "display": "7.9 percentage points",
    "estimand": "difference of two pooled changes in the count of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties, South minus West",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 7.88231,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "south_q123": {
    "ci": [
      -0.9,
      3.4
    ],
    "ciLevel": 0.95,
    "display": "+1.1%",
    "estimand": "pooled change in the count of births from 2018 to 2024, bootstrap interval over counties",
    "n": 167,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the three less deprived quartiles of the named counties in the Census South region",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 1.11262,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "south_q4_gap": {
    "ci": [
      3.2,
      9
    ],
    "ciLevel": 0.95,
    "display": "6.1 percentage points",
    "estimand": "difference of two pooled changes in the count of births, shared bootstrap draws over counties",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "live births in the named counties in the Census South region, three less deprived quartiles minus the most deprived",
    "source": "wonder-natality",
    "unit": "percentage points",
    "value": 6.1364,
    "weights": "births in each county (a pooled ratio of sums over counties); interval from a bootstrap over counties"
  },
  "south_share": {
    "display": "40.1%",
    "estimand": "share of named counties in the Census South region (16 states and DC)",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "percent of named counties",
    "value": 40.1384,
    "weights": "none (full count)"
  },
  "south_states": {
    "display": "16",
    "estimand": "states in the Census South region, besides the District of Columbia (a definition)",
    "note": "",
    "period": "all years (a definition)",
    "population": "states",
    "source": "wonder-natality",
    "unit": "states",
    "value": 16,
    "weights": "none (definition)"
  },
  "ss_actual_p5": {
    "display": "16.6%",
    "estimand": "fall in the county's births to mothers aged 15 to 44, 5th percentile across counties",
    "n": 577,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties at the 5th percentile of change in births to mothers aged 15 to 44",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 16.587,
    "weights": "none (full count)"
  },
  "ss_actual_p95": {
    "display": "19.8%",
    "estimand": "gain in the county's births to mothers aged 15 to 44, 95th percentile across counties",
    "n": 577,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties at the 95th percentile of change in births to mothers aged 15 to 44",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 19.778,
    "weights": "none (full count)"
  },
  "ss_corr_u": {
    "ci": [
      -0.11,
      0.04
    ],
    "ciLevel": 0.95,
    "display": "−0.03",
    "estimand": "correlation, unweighted, one county one count, between the change in births that a county's 2018 age mix implies (each band changing at the all-county rate) and its change; county-cluster bootstrap interval",
    "n": 577,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties that publish all six age bands in 2018 and 2024",
    "source": "wonder-natality",
    "unit": "correlation coefficient",
    "value": -0.0339967,
    "weights": "none (each county counts once)"
  },
  "ss_corr_w": {
    "ci": [
      -0.26,
      -0.06
    ],
    "ciLevel": 0.95,
    "display": "−0.16",
    "estimand": "correlation, weighted by 2018 births to mothers aged 15 to 44, between the change in births that a county's 2018 age mix implies (each band changing at the all-county rate) and its change; county-cluster bootstrap interval",
    "n": 577,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties that publish all six age bands in 2018 and 2024",
    "source": "wonder-natality",
    "unit": "correlation coefficient",
    "value": -0.161351,
    "weights": "2018 births to mothers aged 15 to 44"
  },
  "ss_counties": {
    "display": "577",
    "estimand": "count of counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties that publish all six age bands in 2018 and 2024",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 577,
    "weights": "none (full count)"
  },
  "ss_implied_p5": {
    "display": "8.9%",
    "estimand": "fall implied by the county's 2018 age mix, 5th percentile across counties",
    "n": 577,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties at the 5th percentile of implied change",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 8.90845,
    "weights": "none (full count)"
  },
  "ss_implied_p95": {
    "display": "1.3%",
    "estimand": "fall implied by the county's 2018 age mix, 95th percentile across counties",
    "n": 577,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties at the 95th percentile of implied change",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 1.30902,
    "weights": "none (full count)"
  },
  "ss_left_out": {
    "display": "one",
    "estimand": "count of counties left out of the shift-share check",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties with a withheld age cell in 2018 or 2024",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 1,
    "weights": "none (full count)"
  },
  "tail_cells": {
    "display": "12,138",
    "estimand": "count of cells",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "county-year-by-age cells for mothers under 15 and 45 and over in the named counties",
    "source": "wonder-natality",
    "unit": "cells",
    "value": 12138,
    "weights": "none (full count)"
  },
  "tail_published_share": {
    "display": "0.26%",
    "estimand": "share of those births to mothers under 15 or 45 and over, in published cells",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "live births in the published age-of-mother cells of the named counties",
    "source": "wonder-natality",
    "unit": "percent of live births",
    "value": 0.260325,
    "weights": "none (full count)"
  },
  "tail_withheld_cells": {
    "display": "6,594",
    "estimand": "count of cells with 1 to 9 births, which WONDER withholds",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "county-year-by-age cells for mothers under 15 and 45 and over in the named counties",
    "source": "wonder-natality",
    "unit": "cells",
    "value": 6594,
    "weights": "none (full count)"
  },
  "tail_withheld_max_share": {
    "display": "0.29%",
    "estimand": "largest share of births the withheld tail cells could hold: 9 births in each, over births in published cells",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "live births in the published age-of-mother cells of the named counties",
    "source": "wonder-natality",
    "unit": "percent of live births",
    "value": 0.290465,
    "weights": "none (full count)"
  },
  "thin_cell_limit": {
    "display": "10",
    "estimand": "fewest counties for which a bootstrap interval over counties is printed (the library's minimum number of clusters)",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "cells of the region-by-quartile figure",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 10,
    "weights": "none (full count)"
  },
  "top_tenth_cut": {
    "display": "10.2%",
    "estimand": "gain at the 90th percentile of the county changes in births",
    "n": 578,
    "nUnit": "counties",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties",
    "source": "wonder-natality",
    "unit": "percent of 2018 births",
    "value": 10.1944,
    "weights": "none (full count)"
  },
  "top_tenth_n": {
    "display": "58",
    "estimand": "count of counties at or above the 90th percentile of change",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties in the top tenth of change in births",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 58,
    "weights": "none (full count)"
  },
  "top_tenth_other_max": {
    "display": "5",
    "estimand": "largest count of those counties in any state other than Texas and Florida",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties in the top tenth of change, in the state with the next most",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 5,
    "weights": "none (full count)"
  },
  "top_tenth_south": {
    "display": "43",
    "estimand": "count of those counties in the Census South region (16 states and DC)",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties in the top tenth of change that are in the Census South region",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 43,
    "weights": "none (full count)"
  },
  "top_tenth_texas": {
    "display": "12",
    "estimand": "count of those counties in Texas, which equals the count in Florida (asserted in the build)",
    "note": "",
    "period": "births in 2018 and 2024",
    "population": "named counties in the top tenth of change that are in Texas, a count that Florida also has",
    "source": "wonder-natality",
    "unit": "counties",
    "value": 12,
    "weights": "none (full count)"
  },
  "us_births_2018": {
    "display": "3.79 million",
    "estimand": "count of live births",
    "note": "",
    "period": "2018",
    "population": "live births in the 50 states and DC",
    "source": "wonder-natality",
    "unit": "live births",
    "value": 3791712,
    "weights": "none (full count)"
  },
  "us_births_2024": {
    "display": "3.63 million",
    "estimand": "count of live births",
    "note": "",
    "period": "2024",
    "population": "live births in the 50 states and DC",
    "source": "wonder-natality",
    "unit": "live births",
    "value": 3628934,
    "weights": "none (full count)"
  },
  "wonder_suppression_floor": {
    "display": "10",
    "estimand": "a cell with fewer births than this is withheld (a definition)",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "cells of the WONDER natality files",
    "source": "wonder-natality",
    "unit": "births",
    "value": 10,
    "weights": "none (definition)"
  },
  "wonder_threshold": {
    "display": "100,000",
    "estimand": "population size at which WONDER identifies a county, applied to an earlier population vintage than the 2020 census (a definition)",
    "note": "",
    "period": "births in 2018 to 2024",
    "population": "counties that CDC WONDER natality identifies",
    "source": "wonder-natality",
    "unit": "residents",
    "value": 100000,
    "weights": "none (definition)"
  }
}