| 表２-１-４ 人口の平均年齢,中位数年齢および年齢構造指数：中位推計 | |||||||||||
| 中位数 | 生産年齢人口を15〜64歳とした場合 | 生産年齢人口を20〜69歳とした場合 | |||||||||
| 年 次 | 平均年齢 | 年 齢 | 従属人口指数(％) | 老年化 | 従属人口指数(％) | 老年化 | |||||
| （歳） | （歳） | 総 数 | 年少人口 | 老年人口 | 指数(％) | 総 数 | 年少人口 | 老年人口 | 指数(％) | ||
| 平成 7 | (1995) | 39.6 | 39.7 | 43.9 | 23.0 | 20.9 | 91.2 | 47.6 | 33.6 | 14.0 | 41.5 |
| 8 | (1996) | 39.9 | 40.0 | 44.4 | 22.6 | 21.8 | 96.4 | 47.3 | 32.7 | 14.6 | 44.5 |
| 9 | (1997) | 40.3 | 40.4 | 45.0 | 22.3 | 22.7 | 101.8 | 47.1 | 32.0 | 15.2 | 47.5 |
| 10 | (1998) | 40.7 | 40.7 | 45.6 | 22.0 | 23.6 | 107.2 | 47.1 | 31.3 | 15.8 | 50.6 |
| 11 | (1999) | 41.0 | 41.0 | 46.1 | 21.7 | 24.4 | 112.4 | 47.3 | 30.8 | 16.5 | 53.6 |
| 12 | (2000) | 41.3 | 41.3 | 46.8 | 21.5 | 25.3 | 117.6 | 47.5 | 30.3 | 17.2 | 56.7 |
| 13 | (2001) | 41.6 | 41.6 | 47.7 | 21.4 | 26.3 | 122.5 | 47.9 | 30.0 | 17.9 | 59.7 |
| 14 | (2002) | 42.0 | 41.9 | 48.6 | 21.4 | 27.2 | 127.1 | 48.4 | 29.7 | 18.6 | 62.7 |
| 15 | (2003) | 42.3 | 42.1 | 49.4 | 21.4 | 28.0 | 130.9 | 48.8 | 29.5 | 19.4 | 65.7 |
| 16 | (2004) | 42.5 | 42.4 | 50.1 | 21.5 | 28.7 | 133.7 | 49.3 | 29.2 | 20.0 | 68.6 |
| 17 | (2005) | 42.8 | 42.6 | 51.2 | 21.6 | 29.6 | 137.1 | 49.9 | 29.1 | 20.8 | 71.4 |
| 18 | (2006) | 43.1 | 42.9 | 52.5 | 21.8 | 30.7 | 141.0 | 50.6 | 29.0 | 21.6 | 74.3 |
| 19 | (2007) | 43.4 | 43.2 | 53.9 | 22.0 | 31.9 | 145.0 | 51.3 | 29.0 | 22.3 | 76.9 |
| 20 | (2008) | 43.6 | 43.5 | 55.2 | 22.2 | 33.0 | 148.3 | 52.0 | 29.0 | 23.0 | 79.1 |
| 21 | (2009) | 43.9 | 43.7 | 56.5 | 22.4 | 34.1 | 151.9 | 52.5 | 29.1 | 23.4 | 80.6 |
| 22 | (2010) | 44.1 | 43.9 | 57.2 | 22.6 | 34.6 | 153.6 | 53.3 | 29.2 | 24.2 | 82.8 |
| 23 | (2011) | 44.4 | 44.2 | 57.6 | 22.6 | 35.0 | 154.9 | 54.5 | 29.4 | 25.1 | 85.3 |
| 24 | (2012) | 44.6 | 44.5 | 59.4 | 22.8 | 36.6 | 160.4 | 55.6 | 29.6 | 26.0 | 87.9 |
| 25 | (2013) | 44.8 | 44.9 | 61.5 | 23.1 | 38.4 | 166.4 | 56.6 | 29.8 | 26.8 | 90.1 |
| 26 | (2014) | 45.0 | 45.2 | 63.5 | 23.3 | 40.2 | 172.6 | 57.6 | 29.9 | 27.7 | 92.5 |
| 27 | (2015) | 45.3 | 45.5 | 65.0 | 23.4 | 41.6 | 177.7 | 58.1 | 30.0 | 28.1 | 93.6 |
| 28 | (2016) | 45.5 | 45.8 | 66.2 | 23.5 | 42.7 | 182.2 | 58.2 | 30.0 | 28.2 | 94.3 |
| 29 | (2017) | 45.7 | 46.2 | 67.1 | 23.4 | 43.6 | 186.2 | 59.7 | 30.2 | 29.6 | 98.0 |
| 30 | (2018) | 45.9 | 46.6 | 67.6 | 23.3 | 44.3 | 189.9 | 61.4 | 30.4 | 31.0 | 102.1 |
| 31 | (2019) | 46.1 | 46.9 | 67.9 | 23.2 | 44.8 | 193.0 | 63.1 | 30.6 | 32.5 | 106.3 |
| 32 | (2020) | 46.3 | 47.3 | 68.2 | 23.0 | 45.2 | 196.2 | 64.3 | 30.7 | 33.6 | 109.7 |
| 33 | (2021) | 46.4 | 47.7 | 68.3 | 22.8 | 45.4 | 199.1 | 65.2 | 30.7 | 34.5 | 112.5 |
| 34 | (2022) | 46.6 | 48.0 | 68.1 | 22.6 | 45.5 | 201.5 | 65.7 | 30.6 | 35.1 | 114.9 |
| 35 | (2023) | 46.8 | 48.3 | 68.1 | 22.4 | 45.7 | 204.1 | 66.1 | 30.5 | 35.6 | 116.9 |
| 36 | (2024) | 47.0 | 48.7 | 68.1 | 22.2 | 45.9 | 206.9 | 66.1 | 30.3 | 35.8 | 118.4 |
| 37 | (2025) | 47.1 | 49.0 | 68.0 | 22.0 | 46.0 | 209.3 | 66.1 | 30.1 | 36.1 | 120.0 |
| 38 | (2026) | 47.3 | 49.2 | 67.9 | 21.8 | 46.1 | 211.5 | 66.0 | 29.8 | 36.2 | 121.2 |
| 39 | (2027) | 47.4 | 49.4 | 67.8 | 21.6 | 46.2 | 213.5 | 65.7 | 29.6 | 36.1 | 122.0 |
| 40 | (2028) | 47.5 | 49.6 | 67.9 | 21.5 | 46.4 | 215.7 | 65.5 | 29.4 | 36.1 | 122.9 |
| 41 | (2029) | 47.6 | 49.8 | 68.1 | 21.4 | 46.7 | 217.7 | 65.3 | 29.2 | 36.1 | 123.9 |
| 42 | (2030) | 47.7 | 50.0 | 68.6 | 21.4 | 47.1 | 220.2 | 65.1 | 29.0 | 36.1 | 124.6 |
| 43 | (2031) | 47.8 | 50.1 | 68.3 | 21.3 | 47.0 | 220.3 | 64.9 | 28.8 | 36.1 | 125.2 |
| 44 | (2032) | 47.9 | 50.2 | 69.0 | 21.4 | 47.6 | 222.6 | 64.7 | 28.7 | 36.1 | 125.7 |
| 45 | (2033) | 48.0 | 50.3 | 69.7 | 21.5 | 48.2 | 224.6 | 64.7 | 28.6 | 36.1 | 126.3 |
| 46 | (2034) | 48.1 | 50.4 | 70.5 | 21.6 | 48.9 | 226.6 | 64.8 | 28.6 | 36.2 | 126.9 |
| 47 | (2035) | 48.1 | 50.5 | 71.4 | 21.7 | 49.7 | 228.5 | 65.2 | 28.6 | 36.6 | 127.9 |
| 48 | (2036) | 48.2 | 50.6 | 72.6 | 21.9 | 50.6 | 230.7 | 64.9 | 28.5 | 36.3 | 127.4 |
| 49 | (2037) | 48.2 | 50.6 | 73.9 | 22.2 | 51.7 | 233.0 | 65.4 | 28.6 | 36.8 | 128.5 |
| 50 | (2038) | 48.3 | 50.6 | 75.4 | 22.5 | 52.9 | 235.6 | 66.0 | 28.8 | 37.3 | 129.5 |
| 51 | (2039) | 48.3 | 50.5 | 76.8 | 22.7 | 54.1 | 238.0 | 66.8 | 28.9 | 37.8 | 130.7 |
| 52 | (2040) | 48.3 | 50.5 | 78.1 | 23.0 | 55.1 | 239.8 | 67.6 | 29.2 | 38.5 | 132.0 |
| 53 | (2041) | 48.4 | 50.4 | 79.2 | 23.2 | 56.0 | 241.3 | 68.7 | 29.4 | 39.3 | 133.5 |
| 54 | (2042) | 48.4 | 50.3 | 80.1 | 23.4 | 56.7 | 242.3 | 69.8 | 29.7 | 40.2 | 135.2 |
| 55 | (2043) | 48.4 | 50.2 | 80.9 | 23.6 | 57.3 | 243.1 | 71.2 | 30.0 | 41.2 | 137.2 |
| 56 | (2044) | 48.5 | 50.1 | 81.5 | 23.7 | 57.8 | 243.7 | 72.5 | 30.3 | 42.2 | 139.2 |
| 57 | (2045) | 48.5 | 50.0 | 82.0 | 23.8 | 58.2 | 244.3 | 73.7 | 30.6 | 43.1 | 140.7 |
| 58 | (2046) | 48.5 | 50.0 | 82.3 | 23.9 | 58.4 | 244.6 | 74.7 | 30.8 | 43.8 | 142.1 |
| 59 | (2047) | 48.5 | 49.9 | 82.6 | 23.9 | 58.7 | 245.1 | 75.4 | 31.0 | 44.4 | 143.0 |
| 60 | (2048) | 48.6 | 49.9 | 82.8 | 24.0 | 58.9 | 245.7 | 76.1 | 31.2 | 44.9 | 143.9 |
| 61 | (2049) | 48.6 | 49.9 | 83.0 | 24.0 | 59.0 | 246.4 | 76.6 | 31.3 | 45.3 | 144.5 |
| 62 | (2050) | 48.6 | 49.9 | 83.0 | 23.9 | 59.1 | 247.0 | 77.0 | 31.4 | 45.6 | 145.0 |