Year % of total population 1960 52.5074421660433 1961 52.416402905718 1962 52.3263099691702 1963 52.2360300211049 1964 52.1416013740008 1965 52.0448752330454 1966 51.9507259994471 1967 51.8593975136548 1968 51.7718430931532 1969 51.687956328712 1970 51.607909456826 1971 51.5625273375348 1972 51.5444324880867 1973 51.5203668291078 1974 51.4938122822653 1975 51.4668807355022 1976 51.4390835906234 1977 51.4062543340956 1978 51.3687433459025 1979 51.3261193856295 1980 51.2790639958118 1981 51.2289208674931 1982 51.1768471262581 1983 51.1239789643593 1984 51.0755511584099 1985 51.035806686649 1986 51.0024953894237 1987 50.9732070052584 1988 50.9455347682717 1989 50.9205705822745 1990 50.8963934398816 1991 50.8707155079447 1992 50.8272905239274 1993 50.7683824157341 1994 50.7127094552654 1995 50.660922334353 1996 50.6158962830659 1997 50.5765270137936 1998 50.540622463922 1999 50.5105976995468 2000 50.4861601597118 2001 50.4662328288397 2002 50.4519672933967 2003 50.4437714138709 2004 50.4415125389261 2005 50.4431119560471 2006 50.4443312537644 2007 50.4418187182759 2008 50.4342264970552 2009 50.4251210604169 2010 50.4184504458107 2011 50.4121195745783 2012 50.398921377758 2013 50.378435334238 2014 50.3575272495343 2015 50.3433060947702 2016 50.3396552247034 2017 50.3436149575413 2018 50.3522077220036 2019 50.3635510042921 2020 50.3740201869498 2021 50.3853138333519 2022 50.3999997170522 2023 50.4165923446954