Year % of female population 1960 0.452897664691394 1961 0.454229813225537 1962 0.454934930186313 1963 0.455383748050125 1964 0.455924987436029 1965 0.455226935217979 1966 0.454515721551703 1967 0.455000857496129 1968 0.455029024237317 1969 0.45323427605843 1970 0.449654547818804 1971 0.443952043682982 1972 0.436755275599006 1973 0.430207683945195 1974 0.426045732347709 1975 0.424679180997977 1976 0.426784588866869 1977 0.432564779844313 1978 0.439586308887928 1979 0.445815701839464 1980 0.44751615650945 1981 0.449847762954032 1982 0.461202737775681 1983 0.467055917203853 1984 0.46137177971048 1985 0.458761643717983 1986 0.462976810442528 1987 0.466909939328339 1988 0.467646191635577 1989 0.465784913841894 1990 0.461259209168239 1991 0.458075272927388 1992 0.453461167151879 1993 0.441535148333897 1994 0.431020756411836 1995 0.427756831833409 1996 0.422678514032866 1997 0.413765191253421 1998 0.405217536851469 1999 0.397223919840243 2000 0.389760642770525 2001 0.38264942954989 2002 0.376362295219943 2003 0.371726840238302 2004 0.367382164710536 2005 0.359600385419539 2006 0.349737200313968 2007 0.340044247643122 2008 0.331398043788406 2009 0.323409935267492 2010 0.315316624196875 2011 0.308537559144976 2012 0.302544784346744 2013 0.297254185031018 2014 0.292213165776889 2015 0.285845970116722 2016 0.28020263546027 2017 0.276122269831244 2018 0.272698815062856 2019 0.269047330916016 2020 0.262857393771957 2021 0.253909149027432 2022 0.244445860503976 2023 0.237223571435633