Year % of total population 1960 49.2203699370935 1961 49.2093174369203 1962 49.1998906816931 1963 49.1921057237879 1964 49.1865151851918 1965 49.1826319433632 1966 49.1798672587745 1967 49.1795430223607 1968 49.1800961911057 1969 49.1802383862495 1970 49.1819906957034 1971 49.1851941348143 1972 49.189307831417 1973 49.1936068153588 1974 49.1979269496545 1975 49.1930446448627 1976 49.1788247755218 1977 49.1654167992728 1978 49.1543360345969 1979 49.1456858168299 1980 49.1380102074286 1981 49.1314807488747 1982 49.1264018112254 1983 49.1207064473671 1984 49.1208394301155 1985 49.1278535602687 1986 49.1350736494541 1987 49.1440858171278 1988 49.157693304505 1989 49.1774452747677 1990 49.2038978215713 1991 49.2369759548248 1992 49.2788059142596 1993 49.3272602237018 1994 49.3759600182825 1995 49.4235696998405 1996 49.4690930005911 1997 49.4434332497286 1998 49.4034385526729 1999 49.4275289318415 2000 49.4731384192238 2001 49.5208661316904 2002 49.5596126031848 2003 49.5989812690512 2004 49.639995574387 2005 49.6792807961362 2006 49.7162973081483 2007 49.7493762525816 2008 49.7781202180555 2009 49.8054133791221 2010 49.8283866815807 2011 49.8460805511782 2012 49.8628443133909 2013 49.8767829602992 2014 49.8873476928876 2015 49.8996916901674 2016 49.9106582371023 2017 49.9184163664223 2018 49.9275325294952 2019 49.9351342094478 2020 49.938006100831 2021 49.9405566257686 2022 49.942851629968 2023 49.9427939259873