Year % of total population 1960 48.18058232382588 1961 48.17978882180637 1962 48.1790841086785 1963 48.178273117517115 1964 48.17758260353892 1965 48.1774905163671 1966 48.177738185444724 1967 48.17832856269656 1968 48.17876215942231 1969 48.1783637973766 1970 48.175675848721596 1971 48.193188344833985 1972 48.210406428479274 1973 48.206217124432754 1974 48.20186694952315 1975 48.20081709684776 1976 48.20412649068163 1977 48.20919086016544 1978 48.21673004161007 1979 48.22769307301134 1980 48.2408402842696 1981 48.25368488747951 1982 48.26683256193969 1983 48.281070166389966 1984 48.29631634104294 1985 48.312656593459934 1986 48.32803120383737 1987 48.34211992899583 1988 48.35626764745236 1989 48.370363840171315 1990 48.38264062642031 1991 48.3924163739236 1992 48.4011486529597 1993 48.40778164878185 1994 48.41045513782206 1995 48.410373963472104 1996 48.4088181216091 1997 48.4073069161687 1998 48.40689342091197 1999 48.40719715237712 2000 48.408508459538474 2001 48.41274479511804 2002 48.42121654840299 2003 48.43247602349599 2004 48.445269390873264 2005 48.46056996719051 2006 48.48102953095669 2007 48.504011169894284 2008 48.529487449374685 2009 48.555254464238615 2010 48.57703532748082 2011 48.597658793356885 2012 48.617517675849186 2013 48.63646127989265 2014 48.653568131283585 2015 48.67708148096801 2016 48.70704370099569 2017 48.733222759663455 2018 48.756680294231316 2019 48.779910152461696 2020 48.801893144067634 2021 48.82359307699337 2022 48.84662443903184 2023 48.86714217913582