表ヒョウ２−６　人口の年齢構造に関する指標：1884〜2021年 　 　
年次   人口割合(％)　 平均年齢 中位数年齢 従属人口指数 老年化
指数
0〜14歳 15〜64歳 65歳以上 (歳) (歳) 総  数 年少人口 老年人口
1884 31.63 62.65 5.72 28.9 21.0 59.62 50.48 9.13 18.09
1888 33.73 60.77 5.49 28.2 24.5 64.54 55.51 9.04 16.28
1898 32.83 61.67 5.50 28.0 23.9 62.14 53.23 8.91 16.74
1908 34.22 60.53 5.25 27.7 24.1 65.21 56.54 8.68 15.34
1920 36.48 58.26 5.26 26.7 22.2 71.64 62.62 9.02 14.41
1921 36.74 58.02 5.24 26.7 22.1 72.36 63.32 9.04 14.28
1922 36.78 58.01 5.21 26.6 22.1 72.39 63.41 8.98 14.16
1923 36.78 58.05 5.18 26.6 22.1 72.28 63.36 8.92 14.08
1924 36.67 58.20 5.13 26.5 22.1 71.82 63.01 8.81 13.98
1925 36.70 58.24 5.06 26.5 22.0 71.70 63.02 8.68 13.78
1926 36.76 58.30 4.94 26.4 21.9 71.53 63.06 8.47 13.44
1927 36.73 58.45 4.82 26.3 21.8 71.08 62.84 8.24 13.11
1928 36.69 58.59 4.72 26.3 21.7 70.68 62.63 8.05 12.85
1929 36.59 58.70 4.71 26.3 21.7 70.35 62.33 8.02 12.86
1930 36.59 58.66 4.75 26.3 21.8 70.47 62.37 8.10 12.99
1931 36.65 58.63 4.72 26.3 21.8 70.57 62.51 8.06 12.89
1932 36.79 58.50 4.71 26.3 21.8 70.95 62.89 8.06 12.81
1933 36.93 58.30 4.76 26.3 21.8 71.51 63.35 8.16 12.89
1934 37.07 58.20 4.73 26.3 21.9 71.82 63.70 8.12 12.75
1935 36.89 58.46 4.66 26.3 22.0 71.07 63.10 7.97 12.62
1936 36.92 58.48 4.60 26.3 22.0 71.00 63.13 7.87 12.47
1937 37.07 58.21 4.72 26.4 21.9 71.79 63.68 8.11 12.74
1938 37.09 58.12 4.79 26.5 21.9 72.06 63.81 8.25 12.93
1939 36.79 58.41 4.80 26.6 22.0 71.19 62.98 8.22 13.05
1940 36.68 58.52 4.80 26.6 21.9 70.88 62.67 8.21 13.09
1947 35.30 59.90 4.79 26.6 22.1 66.94 58.94 8.00 13.58
1948 35.37 59.83 4.80 26.6 22.1 67.15 59.12 8.03 13.58
1949 35.50 59.65 4.85 26.5 22.1 67.65 59.52 8.14 13.67
1950 35.37 59.69 4.94 26.6 22.3 67.54 59.26 8.27 13.96
1951 35.07 59.99 4.94 26.7 22.4 66.70 58.47 8.23 14.08
1952 34.59 60.39 5.02 26.9 22.7 65.59 57.29 8.31 14.50
1953 34.18 60.73 5.09 27.1 23.0 64.67 56.29 8.38 14.88
1954 33.85 60.94 5.21 27.4 23.3 64.10 55.55 8.55 15.39
1955 33.38 61.30 5.32 27.6 23.7 63.12 54.45 8.67 15.93
1956 32.59 62.05 5.37 27.9 24.0 61.17 52.52 8.65 16.47
1957 31.74 62.84 5.42 28.2 24.4 59.13 50.50 8.63 17.08
1958 30.99 63.51 5.50 28.5 24.8 57.46 48.80 8.67 17.76
1959 30.23 64.16 5.60 28.8 25.2 55.85 47.12 8.73 18.53
1960 30.04 64.23 5.73 29.1 25.6 55.69 46.78 8.92 19.06
1961 29.77 64.40 5.84 29.3 26.0 55.29 46.23 9.06 19.61
1962 28.66 65.42 5.93 29.6 26.4 52.87 43.81 9.06 20.69
1963 27.47 66.46 6.07 29.9 26.7 50.47 41.34 9.13 22.09
1964 26.33 67.48 6.19 30.1 27.1 48.20 39.02 9.17 23.51
1965 25.61 68.10 6.29 30.4 27.5 46.84 37.60 9.24 24.56
1966 24.76 68.76 6.48 30.7 27.9 45.43 36.00 9.43 26.18
1967 24.36 68.99 6.65 30.9 28.1 44.94 35.30 9.64 27.30
1968 24.08 69.11 6.80 31.1 28.4 44.69 34.85 9.84 28.25
1969 23.97 69.11 6.93 31.3 28.7 44.70 34.68 10.02 28.90
1970 23.93 69.00 7.07 31.5 29.1 44.93 34.69 10.24 29.53
1971 23.97 68.87 7.16 31.7 29.4 45.21 34.80 10.40 29.89
1972 24.20 68.46 7.34 31.9 29.7 46.06 35.34 10.72 30.34
1973 24.33 68.17 7.51 32.0 29.9 46.70 35.69 11.01 30.85
1974 24.40 67.92 7.68 32.2 30.2 47.24 35.92 11.31 31.50
1975 24.33 67.75 7.92 32.5 30.6 47.60 35.91 11.69 32.57
1976 24.31 67.55 8.14 32.7 30.8 48.03 35.99 12.04 33.47
1977 24.22 67.40 8.38 33.0 31.0 48.36 35.93 12.43 34.58
1978 24.06 67.33 8.61 33.3 31.5 48.53 35.73 12.79 35.81
1979 23.82 67.30 8.88 33.6 32.0 48.58 35.39 13.19 37.26
1980 23.51 67.39 9.10 33.9 32.5 48.40 34.89 13.50 38.70
1981 23.42 67.25 9.34 34.3 33.1 48.71 34.82 13.89 39.88
1982 22.96 67.48 9.56 34.6 33.6 48.20 34.03 14.17 41.65
1983 22.52 67.71 9.77 35.0 34.2 47.68 33.26 14.43 43.38
1984 22.04 68.01 9.94 35.3 34.7 47.03 32.41 14.62 45.11
1985 21.51 68.18 10.30 35.7 35.2 46.66 31.55 15.11 47.89
1986 20.90 68.52 10.58 36.0 35.7 45.95 30.51 15.44 50.60
1987 20.25 68.86 10.90 36.4 36.2 45.22 29.40 15.82 53.82
1988 19.53 69.24 11.23 36.8 36.7 44.43 28.21 16.21 57.47
1989 18.82 69.57 11.61 37.2 37.1 43.75 27.06 16.69 61.68
1990 18.24 69.69 12.08 37.6 37.7 43.50 26.17 17.33 66.22
1991 17.66 69.78 12.56 38.0 38.1 43.31 25.31 18.00 71.14
1992 17.17 69.78 13.05 38.4 38.5 43.30 24.60 18.70 76.03
1993 16.70 69.75 13.55 38.8 38.9 43.37 23.95 19.42 81.09
1994 16.33 69.61 14.06 39.2 39.3 43.66 23.46 20.20 86.14
1995 15.95 69.49 14.56 39.6 39.7 43.90 22.96 20.95 91.23
1996 15.64 69.25 15.11 39.9 40.1 44.40 22.59 21.82 96.60
1997 15.35 68.99 15.66 40.3 40.4 44.95 22.25 22.70 102.03
1998 15.07 68.72 16.21 40.7 40.7 45.52 21.93 23.59 107.60
1999 14.79 68.48 16.72 41.0 41.0 46.02 21.60 24.42 113.04
2000 14.58 68.06 17.36 41.4 41.5 46.94 21.42 25.52 119.10
2001 14.36 67.67 17.97 41.8 41.8 47.77 21.23 26.55 125.08
2002 14.20 67.25 18.54 42.1 42.1 48.69 21.12 27.57 130.53
2003 14.03 66.92 19.05 42.5 42.4 49.43 20.96 28.47 135.78
2004 13.89 66.63 19.48 42.9 42.7 50.08 20.84 29.24 140.28
2005 13.76 66.07 20.16 43.3 43.3 51.34 20.83 30.51 146.49
2006 13.65 65.53 20.82 43.7 43.6 52.60 20.82 31.77 152.59
2007 13.53 64.97 21.49 44.0 43.9 53.91 20.83 33.08 158.82
2008 13.45 64.45 22.10 44.3 44.2 55.16 20.87 34.28 164.28
2009 13.34 63.91 22.75 44.6 44.6 56.47 20.87 35.59 170.51
2010 13.15 63.83 23.02 45.0 45.0 56.67 20.60 36.07 175.09
2011 13.07 63.65 23.28 45.3 45.3 57.11 20.54 36.58 178.10
2012 12.98 62.87 24.15 45.6 45.6 59.05 20.64 38.41 186.10
2013 12.88 62.07 25.06 45.8 46.0 61.12 20.74 40.37 194.62
2014 12.77 61.26 25.97 46.1 46.4 63.24 20.85 42.39 203.29
2015 12.55 60.81 26.65 46.4 46.7 64.46 20.63 43.82 212.40
2016 12.43 60.32 27.25 46.7 47.1 65.79 20.61 45.18 219.20
2017 12.31 59.95 27.74 46.9 47.5 66.80 20.53 46.28 225.45
2018 12.19 59.67 28.14 47.2 47.8 67.58 20.43 47.15 230.81
2019 12.06 59.50 28.44 47.4 48.2 68.06 20.26 47.80 235.92
2020 11.90 59.50 28.60 47.6 48.5 68.00 20.00 48.00 239.70
2021 11.80 59.40 28.90 47.9 49.0 68.50 19.80 48.60 245.00
表2-5の人口に対応する。年齢不詳人口を年齢別に按分した人口による。年少（従属）人口指数は0〜14歳人口の15〜64歳人口に対する比率，老年（従属）人口指数は65歳以上人口の同じく15〜64歳人口に対する比率，従属人口指数（総数）はそれらの和。また，老年化指数は65歳以上人口の0〜14歳人口に対する比率で，各指数とも，それぞれ分母人口100について。なお，中位数年齢とは人口を年齢順に並べて数え，ちょうどまん中にあたる人の年齢。平均年齢および中位数年齢は，各歳別人口に基づき算定した。