Year % of total population 1960 50.121511653371 1961 50.1065429006206 1962 50.0891007170148 1963 50.0710272041919 1964 50.0567544620013 1965 50.0908026254567 1966 50.1290238260783 1967 50.1235126810559 1968 50.1140882874358 1969 50.1052820274868 1970 50.0970333752981 1971 50.08993669344 1972 50.0827696042798 1973 50.0749143658835 1974 50.0667184096541 1975 50.05823155846 1976 50.0503241036113 1977 50.0428342814102 1978 50.0340025997982 1979 50.0225072950444 1980 50.0092159992122 1981 49.9935198514287 1982 49.974952434363 1983 49.9566677780464 1984 49.9377325335352 1985 49.9174560578409 1986 49.8990893519887 1987 49.8805507831714 1988 49.8620211235007 1989 49.8457405564778 1990 49.8304533302433 1991 49.8139788974639 1992 49.7967701425748 1993 49.7830899213673 1994 49.7705269243472 1995 49.757268796419 1996 49.7448429125516 1997 49.7336613360067 1998 49.722799714798 1999 49.7141597950415 2000 49.7063000936491 2001 49.698466145447 2002 49.6907068053289 2003 49.6837542059608 2004 49.675669621651 2005 49.6656993865488 2006 49.660644421217 2007 49.6562784718235 2008 49.6497854051784 2009 49.6455519562952 2010 49.6415907645597 2011 49.6351733689095 2012 49.6290730143403 2013 49.6271043029049 2014 49.6268312095097 2015 49.6250976053021 2016 49.6239387757997 2017 49.6234494053683 2018 49.6243417982067 2019 49.6264588435768 2020 49.6326773130837 2021 49.6435177626843 2022 49.6542279963293 2023 49.6610254648255