Year % of total population 1960 51.6229055770815 1961 51.5494507085064 1962 51.4775716339915 1963 51.4102201026315 1964 51.3455210077019 1965 51.2841943668578 1966 51.2239871630615 1967 51.1618738779537 1968 51.100144472399 1969 51.03839428032 1970 50.9785192008097 1971 50.9230483271375 1972 50.8692906602813 1973 50.815980073361 1974 50.7658538997274 1975 50.7209050301839 1976 50.6804385218724 1977 50.6575291720689 1978 50.6490268264422 1979 50.6404456324868 1980 50.6335888994728 1981 50.6293992098451 1982 50.6258059846344 1983 50.6216181535858 1984 50.6171883905815 1985 50.6152219844088 1986 50.6212819359651 1987 50.6276017583978 1988 50.6305846644949 1989 50.6367250590135 1990 50.6454134259319 1991 50.6612880208758 1992 50.6825238066795 1993 50.7033722842683 1994 50.7246431791483 1995 50.7461066385946 1996 50.761671131823 1997 50.780539218367 1998 50.8049049876712 1999 50.8257005520863 2000 50.8468977512555 2001 50.8689915846527 2002 50.8909966101535 2003 50.9147087402395 2004 50.9407011009653 2005 50.9665421985706 2006 50.9938476904209 2007 51.0256577233655 2008 51.0090539972411 2009 50.939389804334 2010 50.8680699405304 2011 50.7959993614831 2012 50.7253646580518 2013 50.6556987606368 2014 50.5847787146664 2015 50.5116659398168 2016 50.4402904708446 2017 50.3717550997313 2018 50.3022864082107 2019 50.2322897443016 2020 50.1811125766225 2021 50.1490358096927 2022 50.1351953072063 2023 50.1391002536377