Year % of total population 1960 48.0630456207815 1961 47.8741144732444 1962 47.6967632752394 1963 47.5551584162235 1964 47.4768376480876 1965 47.251963732557 1966 46.8757413526434 1967 46.5666879193434 1968 46.3395631181501 1969 46.1826164850364 1970 46.072519711891 1971 45.9430305098817 1972 45.8278396668317 1973 45.7799536926924 1974 45.7507123721362 1975 45.7207723008105 1976 45.6888991189219 1977 45.7239800124117 1978 45.8353424570916 1979 45.9714402382467 1980 46.1679250073106 1981 46.3948536282877 1982 46.6196662882001 1983 46.8752262968781 1984 47.136263745405 1985 47.3741272242194 1986 47.5852504351311 1987 47.7773912956864 1988 47.9903273455668 1989 48.238514069469 1990 48.5310647128081 1991 48.8299732645412 1992 49.1363343918165 1993 49.4701169628184 1994 49.8294455977958 1995 50.1839370891384 1996 50.5186906747897 1997 50.8594071046582 1998 51.1895084021473 1999 51.5495127686585 2000 51.9443136931024 2001 52.3524250610689 2002 52.7460055648562 2003 53.1074124870253 2004 53.4489944710018 2005 53.735432654791 2006 53.9629524818293 2007 54.1361077137062 2008 54.2852343147529 2009 54.4416373672627 2010 54.6015163509432 2011 54.7826236965448 2012 54.999845457396 2013 55.2662163339969 2014 55.5753531601437 2015 55.9286734294472 2016 56.3330376845691 2017 56.7710728193802 2018 57.2252968492334 2019 57.7075362919014 2020 58.2239085380656 2021 58.7610738741749 2022 59.315518413803 2023 59.8723436455617