Year % of total population 1960 57.609553958133574 1961 57.51476640709968 1962 57.39679558468172 1963 57.17092908056326 1964 56.97871628788718 1965 56.8777554906822 1966 56.83224269535922 1967 56.86019810824426 1968 56.896089596260396 1969 56.931030896006554 1970 57.001213924970216 1971 57.07630092003642 1972 57.17973529052445 1973 57.29348180064565 1974 57.354578573078854 1975 57.41069669839551 1976 57.48315663818711 1977 57.669379337836176 1978 58.03611405056305 1979 58.41392734672739 1980 58.74462638373285 1981 59.06101267871663 1982 59.3298934075236 1983 59.6221140300762 1984 59.9313967953635 1985 60.1992610917377 1986 60.430907508512405 1987 60.612987782715166 1988 60.76737571546354 1989 60.894351157532306 1990 60.97541496194303 1991 61.0618456621644 1992 61.15411326878643 1993 61.24397939860129 1994 61.379380441507166 1995 61.563332612954405 1996 61.78358707822189 1997 62.050086056669265 1998 62.329885006854546 1999 62.60749471190667 2000 62.893253760030134 2001 63.18919148454364 2002 63.498159531399295 2003 63.799479483047904 2004 64.09544872578633 2005 64.39535218558001 2006 64.65395934631194 2007 64.8550127717737 2008 65.02031035005604 2009 65.1523443862857 2010 65.26244895236782 2011 65.32967760877624 2012 65.33483749672789 2013 65.30269079514389 2014 65.25014353280655 2015 65.19100262992251 2016 65.12613929741934 2017 65.04268440361524 2018 64.9669919971591 2019 64.90926960752877 2020 64.87571360883672 2021 64.88753245749506 2022 64.9162809457667 2023 64.94694065133795