Year % of total population 1960 60.8437877430163 1961 60.4579178131782 1962 60.0716304583512 1963 59.6567353621534 1964 59.2301828632929 1965 58.8389783301524 1966 58.4608491618503 1967 58.0735974261009 1968 57.6820353863507 1969 57.3531373796671 1970 57.065985478707 1971 56.7339163038478 1972 56.3647627028899 1973 55.9873632116457 1974 55.6267163079692 1975 55.2845448789459 1976 54.9545759625026 1977 54.6352476974316 1978 54.3238992606739 1979 54.018522639733 1980 53.7210719570779 1981 53.4308877110226 1982 53.1522255361994 1983 52.8907401505489 1984 52.6522137177427 1985 52.4454965513014 1986 52.2750029960032 1987 52.1373367225901 1988 52.0283428482993 1989 51.9524123662192 1990 51.9176218366221 1991 51.9280293466799 1992 51.9849707840215 1993 52.0903368295475 1994 52.2500230886485 1995 52.4744109436666 1996 52.7637295639409 1997 53.0950003644667 1998 53.4520082127105 1999 53.8324557158107 2000 54.2293810089993 2001 54.6415478459195 2002 55.0722741962412 2003 55.5200876379999 2004 55.9771492605194 2005 56.4362332027979 2006 56.8943342066355 2007 57.3418954447214 2008 57.7655755266635 2009 58.1401494912586 2010 58.4519068087581 2011 58.7088011283498 2012 58.9363016924329 2013 59.1509738719338 2014 59.3211855166788 2015 59.4239535581905 2016 59.4676794783639 2017 59.4739408251179 2018 59.4769917949792 2019 59.5034389155807 2020 59.5682449370206 2021 59.6789694423194 2022 59.8289655576566 2023 60.0185753189991