Year % of total population 1960 50.6470102688676 1961 50.6475627331435 1962 50.6374416809393 1963 50.6331330153408 1964 50.6435354263769 1965 50.6520818203825 1966 50.6582100579869 1967 50.6605931875211 1968 50.6607423551686 1969 50.6585286766144 1970 50.6531084748791 1971 50.6457763838274 1972 50.6350483746337 1973 50.621168413111 1974 50.5918119558231 1975 50.5498353647203 1976 50.5117647460935 1977 50.4766548230788 1978 50.4436042788657 1979 50.4086031480966 1980 50.3676248719113 1981 50.3237769998336 1982 50.2781227388322 1983 50.231625901806 1984 50.1872275379153 1985 50.1449912925045 1986 50.1045372220591 1987 50.0663308328895 1988 50.0315953944099 1989 50.0010730811164 1990 49.9734032875159 1991 49.9463065316724 1992 49.9205017379557 1993 49.8970395893877 1994 49.874915504529 1995 49.854122796621 1996 49.8350883857259 1997 49.823610659702 1998 49.8188461730516 1999 49.8133540172612 2000 49.8071297455483 2001 49.8034225367397 2002 49.8038654672829 2003 49.8072003044437 2004 49.8154959799187 2005 49.8108823383684 2006 49.7869788633592 2007 49.7607487600449 2008 49.7343404617543 2009 49.7072358758445 2010 49.6813115944573 2011 49.6548570545111 2012 49.6261447765434 2013 49.5975906951067 2014 49.571946545549 2015 49.5623888844935 2016 49.5679882194567 2017 49.5734659327911 2018 49.5769039463162 2019 49.581540790119 2020 49.5884156609033 2021 49.5953499077516 2022 49.6023427928242 2023 49.6101734147661