Year % of total population 1960 50.4387361591624 1961 50.4911303638218 1962 50.5493796926721 1963 50.6042411412869 1964 50.6574072176512 1965 50.735264291657 1966 50.8524595675959 1967 50.978953005019 1968 51.069161571387 1969 51.1069179861618 1970 51.1002147773999 1971 51.0766265468094 1972 51.0654566136482 1973 51.0734377798583 1974 51.0929549927587 1975 51.1160736905657 1976 51.1399506490415 1977 51.1652755936231 1978 51.1926796223581 1979 51.2131451104644 1980 51.2238499505723 1981 51.2246744582529 1982 51.2174652352381 1983 51.2035207401656 1984 51.1847493545886 1985 51.1636927194506 1986 51.1406179767596 1987 51.1200127237844 1988 51.0991398849304 1989 51.0726940534417 1990 51.044170844705 1991 51.0137389028595 1992 50.9821366397793 1993 50.9567075751865 1994 50.9346547280443 1995 50.9113023914623 1996 50.888330687882 1997 50.8651506858202 1998 50.8371573039359 1999 50.8018922638023 2000 50.7692415450541 2001 50.751430901827 2002 50.7510487627387 2003 50.7542916278125 2004 50.7486485231897 2005 50.7404063573475 2006 50.7352127516627 2007 50.7348264263889 2008 50.7375539880595 2009 50.741408191742 2010 50.7450785084248 2011 50.7228391483063 2012 50.6772116071482 2013 50.634125071578 2014 50.5941190103787 2015 50.5577484995307 2016 50.5225310856601 2017 50.4892787764875 2018 50.4611604532338 2019 50.4370082369458 2020 50.4365621109903 2021 50.462071803806 2022 50.4867989583264 2023 50.5008725632323