Year % of total population 1960 50.5154756615746 1961 50.5384813039738 1962 50.5545048378697 1963 50.5689954028186 1964 50.554483196277 1965 50.5457362889932 1966 50.557970643891 1967 50.5726477662712 1968 50.5829623121938 1969 50.5731863851636 1970 50.5658587162783 1971 50.5468761367991 1972 50.525596225459 1973 50.5207793797734 1974 50.5274501697781 1975 50.5204750768102 1976 50.4958137338588 1977 50.4639749061459 1978 50.4370844344284 1979 50.4217344910185 1980 50.4019486294318 1981 50.388510148041 1982 50.3831278446121 1983 50.3468546921322 1984 50.3047851900683 1985 50.2725838966458 1986 50.2385384435213 1987 50.2280191194641 1988 50.2294761860938 1989 50.2189359869113 1990 50.1942992482913 1991 50.1626025714075 1992 50.1446823495189 1993 50.148523104436 1994 50.1464931786766 1995 50.129445123113 1996 50.1086807090812 1997 50.0932354545321 1998 50.0800262500684 1999 50.0587120802807 2000 50.0518720111418 2001 50.0564440923019 2002 50.0326617975107 2003 50.0236369094655 2004 50.0795249708409 2005 50.2715223092695 2006 50.6534679514585 2007 50.9441948610403 2008 50.8720079316368 2009 50.5486198243413 2010 50.2967018813632 2011 50.2109347840385 2012 50.1690141722667 2013 50.1521492235143 2014 50.1684755405257 2015 50.2443665800761 2016 50.4237729947121 2017 50.7592424454067 2018 51.0913850844038 2019 51.2753136312484 2020 51.2964008410856 2021 51.2568350277452 2022 51.2562382843612 2023 51.256268018054