Year % of female population 1960 0.589744983374973 1961 0.583650157721849 1962 0.578268189065842 1963 0.572324489523479 1964 0.56542460281677 1965 0.557746375028055 1966 0.54970870629939 1967 0.542030576497748 1968 0.534678531617828 1969 0.527475701918687 1970 0.520795149260277 1971 0.514638998315933 1972 0.509053229732069 1973 0.504184712424378 1974 0.500303728428011 1975 0.497868279517928 1976 0.496711397418072 1977 0.496476635651317 1978 0.497067284617672 1979 0.498695525998971 1980 0.5017002997897 1981 0.50584058813593 1982 0.510964459371562 1983 0.516841080021607 1984 0.523441650359044 1985 0.530615161113625 1986 0.538253207178674 1987 0.54628621777015 1988 0.553621436935616 1989 0.558615562670541 1990 0.560645783542734 1991 0.559930915285292 1992 0.556713745031157 1993 0.551978862998641 1994 0.546901926127285 1995 0.542470547397236 1996 0.538365691091054 1997 0.534336484148307 1998 0.529984284749721 1999 0.525387845707249 2000 0.521068991301323 2001 0.516961109452591 2002 0.513144586200002 2003 0.509916119359643 2004 0.506629766085899 2005 0.503399529013568 2006 0.50009439273159 2007 0.496916400918956 2008 0.494045638584969 2009 0.491416476480368 2010 0.489167934606163 2011 0.487972508591065 2012 0.488194313405208 2013 0.489361948337084 2014 0.49082815136768 2015 0.492483144929565 2016 0.494575346200121 2017 0.497576266353982 2018 0.502099249604424 2019 0.508744038155803 2020 0.51741658416711 2021 0.529357600363387 2022 0.543407431041228 2023 0.557208373830065