Year % of total population 1960 48.3770944229185 1961 48.4507905262295 1962 48.5226621774863 1963 48.5897798973685 1964 48.6544789922981 1965 48.7158056331422 1966 48.7758055220396 1967 48.8383282925488 1968 48.8998555276009 1969 48.96160571968 1970 49.0214807991904 1971 49.0769516728625 1972 49.1305268306571 1973 49.184019926639 1974 49.234322686369 1975 49.2790949698161 1976 49.3197319500108 1977 49.3424708279311 1978 49.3508102038588 1979 49.3595543675132 1980 49.3664111005272 1981 49.3706007901549 1982 49.3743417330535 1983 49.3785260231865 1984 49.3828116094185 1985 49.3847780155912 1986 49.3785834125533 1987 49.3723982416022 1988 49.3694153355051 1989 49.3632749409865 1990 49.3545865740681 1991 49.3387119791242 1992 49.3173491057483 1993 49.2966277157317 1994 49.2754832745956 1995 49.2538933614054 1996 49.2384544114656 1997 49.219460781633 1998 49.195217870451 1999 49.1742994479137 2000 49.1529821299229 2001 49.1310084153473 2002 49.1090033898465 2003 49.085174751196 2004 49.0594142800112 2005 49.0334578014294 2006 49.0061523095791 2007 48.9743422766345 2008 48.9908344865963 2009 49.060610195666 2010 49.1320405360767 2011 49.2040006385169 2012 49.2746353419482 2013 49.3443012393632 2014 49.4152212853336 2015 49.4884430876581 2016 49.5597095291554 2017 49.6281360885901 2018 49.6978224061911 2019 49.7677102556984 2020 49.8187787775607 2021 49.8508560365992 2022 49.8648046927937 2023 49.8608997463623