{
  "alt": "Line chart of births from 2018 to 2024 for two groups of counties. The line for the named counties falls to 2020, rises a little to 2022, reaches its lowest point in 2023 and rises in 2024, ending below the line for the other counties. The line for the other counties is lowest in 2020 and ends nearer its 2018 level.",
  "caption": "Births in the named counties drop to 2020, recover a little through 2022, reach a low in 2023 and rise in 2024. Births in the other counties are lowest in 2020 and end nearer their 2018 level. The index divides each year's births by the 2018 births of the same group of counties; the second view shows the counts.",
  "data": [
    {
      "measure": "index",
      "n": 3020813,
      "series": "Named counties",
      "value": 100,
      "year": 2018
    },
    {
      "measure": "births",
      "n": 3020813,
      "series": "Named counties",
      "value": 3020813,
      "year": 2018
    },
    {
      "measure": "index",
      "n": 2985056,
      "series": "Named counties",
      "value": 98.82,
      "year": 2019
    },
    {
      "measure": "births",
      "n": 2985056,
      "series": "Named counties",
      "value": 2985056,
      "year": 2019
    },
    {
      "measure": "index",
      "n": 2875172,
      "series": "Named counties",
      "value": 95.18,
      "year": 2020
    },
    {
      "measure": "births",
      "n": 2875172,
      "series": "Named counties",
      "value": 2875172,
      "year": 2020
    },
    {
      "measure": "index",
      "n": 2912953,
      "series": "Named counties",
      "value": 96.43,
      "year": 2021
    },
    {
      "measure": "births",
      "n": 2912953,
      "series": "Named counties",
      "value": 2912953,
      "year": 2021
    },
    {
      "measure": "index",
      "n": 2920239,
      "series": "Named counties",
      "value": 96.67,
      "year": 2022
    },
    {
      "measure": "births",
      "n": 2920239,
      "series": "Named counties",
      "value": 2920239,
      "year": 2022
    },
    {
      "measure": "index",
      "n": 2855036,
      "series": "Named counties",
      "value": 94.51,
      "year": 2023
    },
    {
      "measure": "births",
      "n": 2855036,
      "series": "Named counties",
      "value": 2855036,
      "year": 2023
    },
    {
      "measure": "index",
      "n": 2881385,
      "series": "Named counties",
      "value": 95.38,
      "year": 2024
    },
    {
      "measure": "births",
      "n": 2881385,
      "series": "Named counties",
      "value": 2881385,
      "year": 2024
    },
    {
      "measure": "index",
      "n": 770899,
      "series": "Other counties",
      "value": 100,
      "year": 2018
    },
    {
      "measure": "births",
      "n": 770899,
      "series": "Other counties",
      "value": 770899,
      "year": 2018
    },
    {
      "measure": "index",
      "n": 762484,
      "series": "Other counties",
      "value": 98.91,
      "year": 2019
    },
    {
      "measure": "births",
      "n": 762484,
      "series": "Other counties",
      "value": 762484,
      "year": 2019
    },
    {
      "measure": "index",
      "n": 738475,
      "series": "Other counties",
      "value": 95.79,
      "year": 2020
    },
    {
      "measure": "births",
      "n": 738475,
      "series": "Other counties",
      "value": 738475,
      "year": 2020
    },
    {
      "measure": "index",
      "n": 751339,
      "series": "Other counties",
      "value": 97.46,
      "year": 2021
    },
    {
      "measure": "births",
      "n": 751339,
      "series": "Other counties",
      "value": 751339,
      "year": 2021
    },
    {
      "measure": "index",
      "n": 747519,
      "series": "Other counties",
      "value": 96.97,
      "year": 2022
    },
    {
      "measure": "births",
      "n": 747519,
      "series": "Other counties",
      "value": 747519,
      "year": 2022
    },
    {
      "measure": "index",
      "n": 740981,
      "series": "Other counties",
      "value": 96.12,
      "year": 2023
    },
    {
      "measure": "births",
      "n": 740981,
      "series": "Other counties",
      "value": 740981,
      "year": 2023
    },
    {
      "measure": "index",
      "n": 747549,
      "series": "Other counties",
      "value": 96.97,
      "year": 2024
    },
    {
      "measure": "births",
      "n": 747549,
      "series": "Other counties",
      "value": 747549,
      "year": 2024
    }
  ],
  "id": "births_trend",
  "notes": [
    "The named counties are the {fact:counties_used} that CDC WONDER natality identifies in every year from 2018 to 2024: counties with {fact:wonder_threshold} or more residents in the population vintage WONDER uses, which is earlier than the 2020 Census. WONDER pools the births of every other county in a state into one row, so those counties are not in the named counties.",
    "Births are full counts from birth certificates, so no interval is drawn. A count of births is not a birth rate: the series blends births per woman with the number of women."
  ],
  "source": "CDC WONDER natality, births in 2018-2024; full counts of births (no sampling error)",
  "spec": {
    "annotations": [
      {
        "label": "2018 level",
        "type": "y-rule",
        "y": 100
      }
    ],
    "colors": {
      "Named counties": "cat6",
      "Other counties": "muted"
    },
    "n": "n",
    "series": "series",
    "x": "year",
    "xDomain": [
      2018,
      2024
    ],
    "xLabel": "Year of birth",
    "xTicks": "data",
    "y": "value",
    "yDomain": [
      92,
      101
    ],
    "yFormat": {
      "digits": 1
    },
    "yLabel": "Births, 2018 = 100"
  },
  "subtitle": "Live births by year in the {fact:counties_used} counties that CDC WONDER identifies (counties with {fact:wonder_threshold} or more residents in WONDER's population vintage) and in all other counties, which WONDER pools by state, 2018 to 2024, indexed to 2018 or as counts",
  "title": "Births in the named counties fell {fact:decline_named} from 2018 to 2024 with a low in 2023, a larger fall than the {fact:decline_pooled} in all other counties",
  "type": "line",
  "views": [
    {
      "filter": {
        "measure": "index"
      },
      "id": "index",
      "label": "Index, 2018 = 100"
    },
    {
      "caption": "The named counties hold {fact:share_named_2018} of births in 2018 and {fact:share_named_2024} in 2024. Both lines dip in 2020 and again in 2023, and the named counties' line is above the other line in every year.",
      "filter": {
        "measure": "births"
      },
      "id": "counts",
      "label": "Live births",
      "spec": {
        "annotations": [],
        "yDomain": [
          0,
          3200000
        ],
        "yFormat": {
          "digits": 0,
          "thousands": true
        },
        "yLabel": "Live births per year"
      },
      "title": "The named counties hold most of the births in every year, and the count dips in 2020 and again in 2023 in both groups"
    }
  ],
  "width": "body"
}