Year % of total population 1960 52.0551659478175 1961 51.5471662867038 1962 51.0136183745738 1963 50.5705231111402 1964 50.2497318131629 1965 49.9931940647134 1966 49.7783540007787 1967 49.6274777535509 1968 49.5252520980852 1969 49.4675084652344 1970 49.4658788817673 1971 49.5589494973448 1972 49.7295977104304 1973 49.9446934622173 1974 50.2037457685917 1975 50.4939544643564 1976 50.8138709401312 1977 51.1255281051326 1978 51.3894790580558 1979 51.5893640624627 1980 51.7642133911178 1981 51.9079179784392 1982 51.9556215284002 1983 51.9132855329325 1984 51.6835561347579 1985 51.3164157328857 1986 50.9660504726632 1987 50.6946594386005 1988 50.5650376572494 1989 50.5554528959794 1990 50.6215906770656 1991 50.7160409888704 1992 50.9125408154611 1993 51.2335452471962 1994 51.6156159666533 1995 52.050720132504 1996 52.514170091649 1997 53.0279424331252 1998 53.5930818047784 1999 54.1010158033996 2000 54.5269452058737 2001 54.9618636793591 2002 55.4063150371567 2003 55.8112880584152 2004 56.1791156063485 2005 56.4988317750259 2006 56.7834044040618 2007 57.0616032683885 2008 57.317013213017 2009 57.5242110842146 2010 57.6599355793508 2011 57.7376500237103 2012 57.7898117567742 2013 57.8379898535897 2014 57.9040268621922 2015 58.0032502579843 2016 58.1547356768105 2017 58.3688053920121 2018 58.5869606430744 2019 58.7811339214251 2020 59.0128793141378 2021 59.2683560151916 2022 59.5077206431421 2023 59.7474106503476