Year % of total population 1960 51.9116366572977 1961 51.8709401317499 1962 51.8263330724226 1963 51.7822336566684 1964 51.7378523667477 1965 51.6931041115156 1966 51.6519929138862 1967 51.6115204701304 1968 51.5697301939895 1969 51.5303720034567 1970 51.4945046784494 1971 51.4598385363704 1972 51.4259093402382 1973 51.3941592824306 1974 51.3639839662888 1975 51.3307691160905 1976 51.2914542682998 1977 51.2500183110255 1978 51.2093590432282 1979 51.1689473396323 1980 51.1309167267418 1981 51.093623779819 1982 51.0512088257125 1983 51.0091480212092 1984 51.0610345972196 1985 51.2089985072027 1986 51.3699115729466 1987 51.5388937021992 1988 51.7128431110278 1989 51.8173911499208 1990 51.7900969660507 1991 51.7090976985674 1992 51.6328983440192 1993 51.5504922428246 1994 51.4814181304135 1995 51.4341701519605 1996 51.3959137142043 1997 51.3645785716909 1998 51.3366214785761 1999 51.3113274663137 2000 51.2878552401917 2001 51.2671827686912 2002 51.2522179324125 2003 51.2410904803126 2004 51.2259978509025 2005 51.2087930286144 2006 51.1938644331719 2007 51.1756515774257 2008 51.1556913728869 2009 51.1369695895059 2010 51.1154361941247 2011 51.0925851749606 2012 51.0687062207584 2013 51.041041618586 2014 51.0124574828396 2015 50.9808317187886 2016 50.9518054852376 2017 50.9296368836421 2018 50.9107745584715 2019 50.8979713117897 2020 50.8927023315944 2021 50.8948345546079 2022 50.9017327632713 2023 50.908527801166