Year % of female population 1960 39.742503507016 1961 40.3756493798655 1962 40.9356443222238 1963 41.532785855741 1964 41.8327633909951 1965 41.8662053929217 1966 41.9302795389537 1967 41.8656832967545 1968 41.6772638827526 1969 41.4367067789105 1970 41.1481353633542 1971 40.895294339147 1972 40.5659605037606 1973 40.2048932937271 1974 39.8386900286556 1975 39.443167494424 1976 39.2057027385444 1977 38.975777014023 1978 38.6190608862987 1979 38.3618219293311 1980 38.1996991720067 1981 38.110239851379 1982 38.0977404577963 1983 38.0823729338897 1984 38.0344923938336 1985 37.960058160871 1986 37.8341891407276 1987 37.632158926708 1988 37.346562498447 1989 37.0237299248397 1990 36.6946843194647 1991 36.3392811684458 1992 35.9478526846127 1993 35.495828368135 1994 34.959085992002 1995 34.3211921113668 1996 33.5701338354248 1997 32.7305523723908 1998 31.8354361983068 1999 30.9229177152999 2000 30.0423930401777 2001 29.2037035998359 2002 28.409908148198 2003 27.6523976915738 2004 26.9144476799903 2005 26.1856242061442 2006 25.4498751738562 2007 24.7380356789857 2008 24.0928750947373 2009 23.5307285327679 2010 23.0712888393418 2011 22.7263739068485 2012 22.4814018752101 2013 22.3141454955284 2014 22.1912230019431 2015 22.0733190590536 2016 21.9418043516896 2017 21.7850189087676 2018 21.6161049275781 2019 21.4469895747804 2020 21.277230834785 2021 21.1303186172298 2022 20.9874160944742 2023 20.8182827860639