Year % of total population 1960 50.4665625141176 1961 50.4400565341519 1962 50.4151981151293 1963 50.4033295407436 1964 50.392414604552 1965 50.3696286631761 1966 50.3456860454684 1967 50.3216967308558 1968 50.2977872807556 1969 50.2742676512403 1970 50.251323861433 1971 50.2295535466801 1972 50.2091484650638 1973 50.1885439644802 1974 50.168100312582 1975 50.1495209218567 1976 50.135482348355 1977 50.1280509578003 1978 50.1261186362405 1979 50.1289025996113 1980 50.1340249092335 1981 50.1388468799695 1982 50.1425993737728 1983 50.1469946731711 1984 50.1530446549614 1985 50.1607212157111 1986 50.1697650467758 1987 50.1820191694296 1988 50.1946009296841 1989 50.2032211262601 1990 50.2174874678311 1991 50.2420020302762 1992 50.274159981027 1993 50.3147352095072 1994 50.8583153921961 1995 51.6230555960483 1996 51.5940710385362 1997 51.5676953361615 1998 51.6194977791171 1999 51.7426678803788 2000 51.8583440742028 2001 51.9716398743619 2002 52.0484201126906 2003 52.0258772417154 2004 51.9462165711824 2005 51.8737524648807 2006 51.80887601016 2007 51.7499638775668 2008 51.6964022475577 2009 51.6476685918797 2010 51.6033078181645 2011 51.5638561352195 2012 51.5168536320006 2013 51.4588766231134 2014 51.4045405130391 2015 51.3544881503061 2016 51.3074915813134 2017 51.2643190021143 2018 51.221571540196 2019 51.179755899247 2020 51.1412739128894 2021 51.1046370315962 2022 51.0692620249061 2023 51.036422741824