Year % of female population 1960 0.385347150863577 1961 0.38803954324583 1962 0.38994259138144 1963 0.390676569923872 1964 0.389514933054246 1965 0.387178076084791 1966 0.384419797197421 1967 0.380799125665165 1968 0.379923474642663 1969 0.388189425569538 1970 0.406254261169947 1971 0.432324845506555 1972 0.465319311686228 1973 0.501398653246121 1974 0.535538869537277 1975 0.566110284479308 1976 0.594079211168653 1977 0.618955261368243 1978 0.641047426662117 1979 0.661947029646861 1980 0.681575034601465 1981 0.700178528028137 1982 0.71776513503895 1983 0.732959799641235 1984 0.744334994894157 1985 0.751829991754982 1986 0.756326821046489 1987 0.757601424221131 1988 0.753589763885784 1989 0.742289501106526 1990 0.72646402259579 1991 0.711494980375298 1992 0.700212256002404 1993 0.691159753003043 1994 0.682324166815369 1995 0.672413912909805 1996 0.662137386041404 1997 0.651727778576494 1998 0.640513089315999 1999 0.628292215664793 2000 0.616176926678931 2001 0.603932510063552 2002 0.591227378450787 2003 0.57870036918006 2004 0.56700584058379 2005 0.556838356960974 2006 0.547425180318724 2007 0.538333981263673 2008 0.530657130697111 2009 0.524707427937654 2010 0.520275422405098 2011 0.517235573415349 2012 0.515569324444624 2013 0.515179390239122 2014 0.516013508244552 2015 0.517965168985049 2016 0.521881310774786 2017 0.529143841632711 2018 0.538173925141577 2019 0.547602885079496 2020 0.548338462513957 2021 0.545403921865954 2022 0.549713437980246 2023 0.55951913427675