{
  "alt": "County map of the United States shaded by the percent change in births from 2018 to 2024. The counties with the largest gains are concentrated in the South, with Texas and Florida holding the most. Counties in the Midwest, the Northeast and the West more often have values toward the low end of the key than toward the high end. Most counties are gray hatched because WONDER does not identify them.",
  "caption": "Counties toward the high end of the key gained births and counties toward the low end lost them. Gray hatched counties are not named by WONDER, which pools their births by state, so they have no value; the tooltip says so. Texas and Florida each hold {fact:top_tenth_texas} of the {fact:top_tenth_n} counties in the top tenth by change, and no other state holds more than {fact:top_tenth_other_max}. Counties in the Midwest, the Northeast and the West more often lost births than gained them. The key ends at {fact:map_key_limit} percent in each direction, and {fact:map_beyond_key} counties changed by more and are drawn at its end color.",
  "data": [],
  "id": "births_change_map",
  "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, so no interval is drawn for a county. A small county's count moves more from year to year by chance, so the shading of a county with few births is less stable than the shading of a large one.",
    "The tooltip gives the value of a county whose change is beyond the end of the key.",
    "Connecticut is shown as its eight legacy counties, the coding of the source. Alaska is drawn. Puerto Rico is not in these data and is not drawn."
  ],
  "source": "CDC WONDER natality, births in 2018-2024; full counts of births (no sampling error); county changes are not weighted",
  "spec": {
    "fips": "fips",
    "legendLabel": "Change in live births, 2018 to 2024 (%; the key ends at 20 either way)",
    "payload": "births_change_map.json",
    "scale": {
      "domain": [
        -20,
        0,
        20
      ],
      "ends": [
        "Fewer births",
        "More births"
      ],
      "palette": "div",
      "type": "diverging"
    },
    "tooltipKeys": [
      "births_2018",
      "births_2024"
    ],
    "tooltipLabels": {
      "births_2018": "Live births, 2018",
      "births_2024": "Live births, 2024"
    },
    "value": "change",
    "valueFormat": {
      "digits": 1,
      "signed": true
    }
  },
  "subtitle": "Percent change in live births from 2018 to 2024 by county, for the {fact:counties_used} counties that CDC WONDER identifies (counties with {fact:wonder_threshold} or more residents in WONDER's population vintage)",
  "title": "Of the {fact:top_tenth_n} counties with the largest gains in births, {fact:top_tenth_south} are in the South, which holds {fact:south_share} of the named counties",
  "type": "county-map",
  "width": "full"
}