Year % of total population 1960 51.4388196500933 1961 51.4076433591801 1962 51.3830776974446 1963 51.3585143170342 1964 51.3360157161903 1965 51.313254555966 1966 51.2909757260337 1967 51.2720398324824 1968 51.2539440075559 1969 51.2377140469059 1970 51.2174123714656 1971 51.1954488744265 1972 51.175219475958 1973 51.1509536595167 1974 51.0965486256583 1975 51.0417841440446 1976 51.0184796152994 1977 50.9976287402964 1978 50.9772200485967 1979 50.9603722502092 1980 50.9485574740797 1981 50.9401038156847 1982 50.9356118844144 1983 50.935088405062 1984 50.938299514022 1985 50.9457209310063 1986 50.955465871562 1987 50.9673601694586 1988 50.9840125201248 1989 51.0057425328565 1990 51.033200429037 1991 51.0480776462576 1992 51.045584091587 1993 51.0405208492039 1994 51.0355197548943 1995 51.0328994360934 1996 51.0318547337912 1997 51.0300609382019 1998 51.0262148466701 1999 51.0225904681321 2000 51.0179619377722 2001 51.0145765620404 2002 50.9667024329124 2003 50.8850002616607 2004 50.7996570550618 2005 50.7104963780326 2006 50.6505539910322 2007 50.588275830883 2008 50.5384242772427 2009 50.5485965553833 2010 50.5887946717022 2011 50.6348103474074 2012 50.6992844267832 2013 50.7748727406693 2014 50.8328510481033 2015 50.8707846523153 2016 50.9042899134697 2017 50.9394500320603 2018 50.9676933747048 2019 50.9818258632488 2020 50.9905590992717 2021 50.9934216642957 2022 50.9887858418125 2023 50.9836146023702