Year % of total population 1960 49.8206141797735 1961 49.861010206005 1962 49.8950890172829 1963 49.9241122540683 1964 49.9481770725728 1965 49.9674979117829 1966 49.984033920512 1967 49.9966240221721 1968 50.0065110397424 1969 50.0141525383534 1970 50.0197556855372 1971 50.0227205746781 1972 50.0294472808932 1973 50.0390476491119 1974 50.0441248959818 1975 49.9898373209145 1976 49.8535944888913 1977 49.6799534477742 1978 49.4916461243495 1979 49.3061199915711 1980 49.1357908206891 1981 48.9730612184183 1982 48.8115182188191 1983 48.6606631435815 1984 48.5286333371554 1985 47.8203103697732 1986 46.6429641288971 1987 45.602605013464 1988 44.6771132532109 1989 43.8504105989014 1990 43.1084319188883 1991 42.4387672562127 1992 41.8296748936016 1993 41.3018107331162 1994 41.2094156795201 1995 41.4813188553081 1996 41.7397977699124 1997 41.9871766325791 1998 42.2256700034697 1999 42.4560235233071 2000 42.6782433466012 2001 42.8926668443768 2002 43.0994579513983 2003 43.2865191643362 2004 43.2466872295052 2005 43.0039933333121 2006 42.7706804017263 2007 42.5465709790076 2008 42.3321443606028 2009 42.1286529156041 2010 40.7025331082052 2011 38.4582162669519 2012 36.6395150553841 2013 35.5575526373707 2014 35.3654171697719 2015 35.2446075362806 2016 34.8274129334003 2017 34.8082082779411 2018 35.4212864286092 2019 36.4577793188794 2020 37.9146537647255 2021 38.9053043366499 2022 39.1321544182656 2023 39.3032531332465