Year % of total population 1960 51.4663077093402 1961 51.3595896845245 1962 51.2543097284355 1963 51.1485258323327 1964 51.0456887904202 1965 50.9451199586558 1966 50.84844589662 1967 50.7550288508314 1968 50.6650755752584 1969 50.5819607197017 1970 50.5072713150473 1971 50.5360129225088 1972 50.6712933435005 1973 50.8201882226004 1974 50.9592688380468 1975 51.0809736564145 1976 51.1648055346805 1977 51.3024084922859 1978 51.512685712159 1979 51.6947338144659 1980 51.8510651924519 1981 51.7044586464243 1982 51.2277557225796 1983 50.6060754222729 1984 49.8559167427134 1985 48.9131295254544 1986 48.4111628032865 1987 48.4923406531344 1988 48.5708439833681 1989 48.6443707264514 1990 48.7056031749176 1991 48.7372197752685 1992 48.5834032454634 1993 48.2519969223128 1994 47.9458136041565 1995 47.653635181527 1996 47.3654024464818 1997 47.2688336335649 1998 47.3336090600387 1999 47.4003671027091 2000 47.4681194001717 2001 47.5289899066507 2002 47.589300247575 2003 47.6579081244888 2004 47.7315843779864 2005 47.8063176545138 2006 47.8791780998839 2007 47.9479596946113 2008 48.0128510543843 2009 48.0741440344303 2010 48.1366129727223 2011 48.2023365223315 2012 48.266768410888 2013 48.3281482349356 2014 48.4211628193332 2015 48.5989907314173 2016 48.5945763192742 2017 48.4899059975927 2018 48.5220197163794 2019 48.5615047965506 2020 48.605182615869 2021 48.6504646102425 2022 48.6994724085773 2023 48.749850511868