Year % of total population 1960 50.75698816291329 1961 50.74403142923664 1962 50.73633457117412 1963 50.733396232056144 1964 50.731084516603424 1965 50.726590421610744 1966 50.721598606801365 1967 50.71792792927504 1968 50.71494378812302 1969 50.71326955269562 1970 50.71355002296392 1971 50.711535348746274 1972 50.71242775315453 1973 50.719205322383374 1974 50.72490045360094 1975 50.72606941277 1976 50.72108758248552 1977 50.715030315954095 1978 50.70902143738681 1979 50.70093367445767 1980 50.69663638525792 1981 50.69464934664072 1982 50.6876849766898 1983 50.676696199133495 1984 50.66477345744786 1985 50.65209638162141 1986 50.64423242471825 1987 50.64270810528306 1988 50.6414024363562 1989 50.64227805275768 1990 50.645629520926875 1991 50.64987915416131 1992 50.65218500741168 1993 50.652479521439034 1994 50.65466020481932 1995 50.65756130293527 1996 50.659808456856034 1997 50.664135646811424 1998 50.66895436654585 1999 50.67319443976779 2000 50.67824028866521 2001 50.6815857990702 2002 50.68280193116858 2003 50.68367042923645 2004 50.683970290044115 2005 50.68297190937614 2006 50.680277952511936 2007 50.67635523228525 2008 50.67039245102541 2009 50.663266895632546 2010 50.657011949118974 2011 50.6512539542921 2012 50.64544360970069 2013 50.639338979442996 2014 50.633918739538714 2015 50.6261493316763 2016 50.613524504829336 2017 50.59965714210633 2018 50.58614594089069 2019 50.57177198105576 2020 50.55515112128486 2021 50.53560667325839 2022 50.51881860417375 2023 50.50221508682939