Year % of female population 1960 17.0503066260133 1961 17.1554074207085 1962 17.2569971794315 1963 17.308712134144 1964 17.3600999970338 1965 17.4231907576794 1966 17.4248708616974 1967 17.4124794243921 1968 17.4233113461502 1969 17.4366574531519 1970 17.4587896673673 1971 17.5531395064745 1972 17.6890563629646 1973 17.8320250180723 1974 17.9750221945916 1975 18.0706455922682 1976 18.1144535050144 1977 18.1178454599425 1978 18.0881449982885 1979 18.0354554003662 1980 17.9696897920018 1981 17.8924947061977 1982 17.8112714052884 1983 17.8197646629414 1984 17.9849253803992 1985 18.2838667973349 1986 18.665477927534 1987 19.07937281839 1988 18.3983785357823 1989 17.7106907968699 1990 18.1309885142001 1991 18.5787507041447 1992 19.2487776385579 1993 19.9382669845575 1994 20.1754197317203 1995 20.1072133268373 1996 20.0820376125955 1997 20.0293396665347 1998 19.6366257017145 1999 19.2455717578693 2000 19.1682524850487 2001 19.1278474711997 2002 19.1372196501642 2003 19.1169112904802 2004 18.8934750355543 2005 18.4703349126336 2006 17.9463936399996 2007 17.3881472776631 2008 16.9238375406329 2009 16.6185217885815 2010 16.3616181208482 2011 16.2242381844348 2012 16.2681192411884 2013 16.3479107731661 2014 16.6238570375996 2015 16.8135135739387 2016 16.8442076397119 2017 16.8523179729065 2018 16.3441132709164 2019 15.3026691561911 2020 14.2865021367894 2021 13.5100617426794 2022 12.9446072396275 2023 12.6879849677264