Year % of total population 1960 53.5390970444496 1961 53.7075517668211 1962 53.8723395116084 1963 54.0478140677793 1964 54.1745592306572 1965 54.1157380379971 1966 53.9169002559326 1967 53.7080747392051 1968 53.5040104019801 1969 53.3015732328828 1970 53.1057148200223 1971 52.9226779056573 1972 52.7483667151836 1973 52.5854849669959 1974 52.4439753590854 1975 52.3236720418637 1976 52.2293549174894 1977 52.1586834332678 1978 52.1073897818084 1979 52.0792059592678 1980 52.0766935804838 1981 52.1023040232512 1982 52.1556700740616 1983 52.2327116286469 1984 52.3324868214985 1985 52.4547739132388 1986 52.5951275732968 1987 52.7487883397602 1988 52.9129559964879 1989 53.0836004747617 1990 53.2567763419492 1991 53.4327413085641 1992 53.6205675096057 1993 53.8422084630921 1994 54.081422344832 1995 54.3503724874666 1996 54.7088415556373 1997 55.4245671517522 1998 56.283600990042 1999 56.9161809414058 2000 57.3867721427296 2001 57.8269096742546 2002 58.2229003261193 2003 58.3628571534863 2004 58.3502877049952 2005 58.4254415447099 2006 58.6862924635736 2007 59.0618195183519 2008 59.4502008186788 2009 59.8342808757711 2010 60.1839426588026 2011 60.5246205075626 2012 60.8499559623241 2013 61.180547515957 2014 61.5508350381893 2015 61.9716693217154 2016 62.4426405175999 2017 62.9476102698195 2018 63.4542914383115 2019 63.9254967904849 2020 64.3514322720785 2021 64.7338559957307 2022 65.0716399227906 2023 65.3639454989179