全人口に対する生産年齢人口(15〜64歳)の割合推移

年　　　割合
1950 59.64%
1955 61.24%
1960 64.12%
1965 67.98%
1970 68.90%
1975 67.72%
1980 67.35%
1985 68.16%
1990 69.50%
1995 69.42%
2000 67.93%
2005 65.82%
2010 63.28%
2015 60.03%
2020 59.18%