Year % of total population 1960 50.3911734592655 1961 50.3904900341047 1962 50.3925317165713 1963 50.3935855573776 1964 50.3944666571712 1965 50.3965551641946 1966 50.3977042796446 1967 50.4010978896443 1968 50.4073764096395 1969 50.4162346101238 1970 50.426846596247 1971 50.4409585324486 1972 50.4574110262879 1973 50.4761128950495 1974 50.4991384847304 1975 50.5213412747571 1976 50.5416170401788 1977 50.5623308134752 1978 50.5834098333702 1979 50.6065142561127 1980 50.6303712964784 1981 50.6532986956652 1982 50.6732212364315 1983 50.6898850425773 1984 50.7042138013799 1985 50.7137287350287 1986 50.7190241609855 1987 50.7215840640748 1988 50.7207711427015 1989 50.7176178872715 1990 50.7141533986067 1991 50.7070221438161 1992 50.6953282881223 1993 50.680497326126 1994 50.6658291457286 1995 50.6510070203662 1996 50.635891466659 1997 50.6205349546423 1998 50.6049641139296 1999 50.5876477061213 2000 50.5682917170272 2001 50.5509119249776 2002 50.532870693404 2003 50.5170434487724 2004 50.5069811466386 2005 50.4967981056278 2006 50.4846035005636 2007 50.4703888262945 2008 50.4550542083405 2009 50.4405358085079 2010 50.4253853779845 2011 50.4110641002465 2012 50.3961196645075 2013 50.3798584452442 2014 50.3640552693644 2015 50.3473530926437 2016 50.3287361151681 2017 50.3111402538205 2018 50.295143519172 2019 50.2800956127786 2020 50.266743178991 2021 50.2556096094455 2022 50.2486033856709 2023 50.2443869500363