Year % of total population 1960 48.4462601672249 1961 48.4855030916286 1962 48.5534919074733 1963 48.6192366343581 1964 48.6701311836931 1965 48.7093239989367 1966 48.7460930246625 1967 48.7835958409528 1968 48.8184477647752 1969 48.8461166806995 1970 48.8527116056408 1971 48.8490608184356 1972 48.84113197681 1973 48.8119199138911 1974 48.7780815575307 1975 48.7439389978365 1976 48.7080443676161 1977 48.6792445019668 1978 48.6566162426137 1979 48.645781996274 1980 48.6466850648184 1981 48.6612992937341 1982 48.6837485244765 1983 48.6978011542729 1984 48.7111207431744 1985 48.729007156918 1986 48.7430360874897 1987 48.7552588428704 1988 48.7701722109294 1989 48.7963963812147 1990 48.8386462253265 1991 48.8533922909242 1992 48.8470618908659 1993 48.8528674744861 1994 48.8543722425595 1995 48.8483648814479 1996 48.8394754452493 1997 48.8368276666651 1998 48.8392806019959 1999 48.8541902646776 2000 48.8667107858624 2001 48.8669721221255 2002 48.8848316768547 2003 48.9142894246943 2004 48.9428816725196 2005 48.9740840432743 2006 49.0076401235584 2007 49.0671718971761 2008 49.1503331636618 2009 49.2074438822379 2010 49.2470439191888 2011 49.2906569626881 2012 49.3392980110154 2013 49.3921084441396 2014 49.4361177514179 2015 49.4761723755369 2016 49.5331365555869 2017 49.5754042950242 2018 49.5853746708237 2019 49.5967856664756 2020 49.6145040876354 2021 49.635110820965 2022 49.6590458730375 2023 49.6856821599176