Year % of total population 1960 49.4494890309776 1961 49.459616579267 1962 49.504071214686 1963 49.5829525835977 1964 49.6651557103487 1965 49.7462813405605 1966 49.8253754244687 1967 49.8985724425276 1968 49.9618238693607 1969 50.0163978161168 1970 50.0235141983206 1971 49.9916666891405 1972 49.9622838628381 1973 49.9353191082493 1974 49.9106060191529 1975 49.8820016233515 1976 49.8431684061734 1977 49.7884628440959 1978 49.7130579345969 1979 49.6129180848993 1980 49.4736739386541 1981 49.2733294601019 1982 49.0837852268221 1983 48.9407806076321 1984 48.8218335463098 1985 48.7451394441019 1986 48.6907910777929 1987 48.6493921692453 1988 48.6235214024338 1989 48.5793210740254 1990 48.5310066983046 1991 48.5083692389953 1992 48.492725233898 1993 48.461468655495 1994 48.4129211854901 1995 48.3646953521932 1996 48.3176876873769 1997 48.274786149681 1998 48.2363120452167 1999 48.2000056719851 2000 48.1633912798595 2001 48.1253052932527 2002 48.0840254355357 2003 48.0363287681507 2004 47.9817020687896 2005 47.9203162334996 2006 47.8539502283229 2007 47.8172627297456 2008 47.8114150741443 2009 47.8067004334787 2010 47.802727299194 2011 47.7984387070053 2012 47.7936840813667 2013 47.7872466592797 2014 47.7774793116254 2015 47.7619078340688 2016 47.7384405432517 2017 47.7079315373084 2018 47.6755250112247 2019 47.6502483910986 2020 47.6332136237827 2021 47.6181893827008 2022 47.6065085619703 2023 47.6020130895123