{
  "run": "016-congress-age",
  "as_of": "2026-07-13",
  "source": "@unitedstates/congress-legislators (birthdays + term dates, all members) \u00d7 US median age (Census Bureau)",
  "years": [
    1919,
    2025
  ],
  "n_congresses": 50,
  "now": {
    "year": 2025,
    "all": 59.3,
    "house": 57.7,
    "senate": 65.5,
    "pct_over70": 22.7,
    "oldest_age": 92,
    "oldest_name": "Chuck Grassley",
    "us_median": 39.2
  },
  "low": {
    "year": 1981,
    "all": 49.7
  },
  "since1980": {
    "all": {
      "slope_per_decade": 2.58,
      "r2": 0.942,
      "p": 1.9375969102708272e-14,
      "n": 23,
      "ci95_decade": [
        2.29,
        2.87
      ]
    },
    "house": {
      "slope_per_decade": 2.58,
      "r2": 0.911,
      "p": 1.6736585424934348e-12,
      "n": 23,
      "ci95_decade": [
        2.22,
        2.95
      ]
    },
    "senate": {
      "slope_per_decade": 2.98,
      "r2": 0.954,
      "p": 1.427473954091349e-15,
      "n": 23,
      "ci95_decade": [
        2.68,
        3.27
      ]
    },
    "gap": {
      "slope_per_decade": 0.57,
      "r2": 0.492,
      "p": 0.00019364525489626568,
      "n": 23,
      "ci95_decade": [
        0.3,
        0.83
      ]
    }
  },
  "over70": {
    "then_year": 1981,
    "then": 4.0,
    "now": 22.7
  },
  "gap_now": 20.1,
  "gap_1980": 19.4,
  "all_1980": 49.7,
  "senate_1980": 52.2
}