Year % of female population 1960 0.571563081585664 1961 0.572656983886119 1962 0.57247846998567 1963 0.573518613254266 1964 0.573290791516661 1965 0.572175739213601 1966 0.57149407218183 1967 0.570875417098055 1968 0.569679022260145 1969 0.565691507498125 1970 0.558502776956704 1971 0.552046739325992 1972 0.547879866059487 1973 0.543499795279542 1974 0.537414113639211 1975 0.531052699170794 1976 0.52274844775716 1977 0.513609570041609 1978 0.506488479195986 1979 0.498711215818619 1980 0.492085054475895 1981 0.487851540080352 1982 0.484501236859339 1983 0.486725019297147 1984 0.491020362257816 1985 0.48815718713385 1986 0.481414526633813 1987 0.475194694529564 1988 0.469271396812789 1989 0.462222183148122 1990 0.455183778597255 1991 0.449034850740326 1992 0.443374290985051 1993 0.438844578409302 1994 0.433435738480337 1995 0.428428846480548 1996 0.425656983013023 1997 0.423879070764714 1998 0.421564898555476 1999 0.418316265517998 2000 0.413879709576717 2001 0.410201307454975 2002 0.412268082318535 2003 0.421229336835806 2004 0.438388301692666 2005 0.465941577361198 2006 0.505887752515738 2007 0.558903953950509 2008 0.625063957847341 2009 0.704400959948292 2010 0.795169152086343 2011 0.831484625662955 2012 0.807189149156923 2013 0.775715440254018 2014 0.737935895787107 2015 0.696332840509347 2016 0.652766996681692 2017 0.61095361954584 2018 0.575105240514931 2019 0.54708373595277 2020 0.523476651026206 2021 0.50292410553625 2022 0.486989282316613 2023 0.47489062097191