Year % of total population 1960 49.7339292688858 1961 49.7639331523834 1962 49.7961023412349 1963 49.8331563078861 1964 49.8687938850404 1965 49.8957746892251 1966 49.9204673743777 1967 49.9458840342139 1968 49.9679502780487 1969 49.9883961753877 1970 50.0065322665967 1971 50.0228957677684 1972 50.046723928654 1973 50.0734586346977 1974 50.0897042923712 1975 50.1008362116714 1976 50.1127686045985 1977 50.1248010343978 1978 50.1393010508049 1979 50.1531138817503 1980 50.1653468561168 1981 50.1766814208378 1982 50.1890677445888 1983 50.2068673912014 1984 50.2289805246367 1985 50.2463088156506 1986 50.2545127245175 1987 50.2544682580936 1988 50.2521947589595 1989 50.2548287828293 1990 50.2604387602426 1991 50.2657325332023 1992 50.2675642528963 1993 50.267952319646 1994 50.2708316298016 1995 50.2767119684568 1996 50.2842909810097 1997 50.2925629988043 1998 50.2993316815079 1999 50.3055202119605 2000 50.3142530722295 2001 50.3247814445498 2002 50.3355913389946 2003 50.3450445396943 2004 50.3541835461506 2005 50.3631614872815 2006 50.3673465639602 2007 50.3684329665392 2008 50.3708678146011 2009 50.3738063867727 2010 50.3769606523391 2011 50.3783866059789 2012 50.3788569229752 2013 50.381506488463 2014 50.3844890866274 2015 50.3867572491383 2016 50.387109977898 2017 50.3805983446622 2018 50.371227899441 2019 50.364187896889 2020 50.3637272241412 2021 50.3671591054596 2022 50.3689883962407 2023 50.3709756546112