Year % of female population 1960 7.27877874064716 1961 6.79869206865805 1962 6.55272891797124 1963 6.63043022799349 1964 7.03371225823501 1965 7.73346335900541 1966 8.52069893581186 1967 9.12559406765151 1968 9.47655089752954 1969 9.60879534619891 1970 9.53964913544741 1971 9.39767598789087 1972 9.33588043435085 1973 9.34400149955834 1974 9.39177951493459 1975 9.43705147919892 1976 9.43863948048946 1977 9.3462521677903 1978 9.1260468610041 1979 8.7541867779862 1980 8.26612273521163 1981 7.76770833780832 1982 7.32493506732219 1983 6.95041211247489 1984 6.66480620414365 1985 6.49450060425729 1986 6.42581288906509 1987 6.46113816904692 1988 6.60626649161954 1989 6.83824260222799 1990 7.09430080175094 1991 7.31049509897046 1992 7.45834353167588 1993 7.56612590288695 1994 7.68033269154121 1995 7.80907340968033 1996 7.97148463444807 1997 8.17835251889987 1998 8.43124178647785 1999 8.72741590903827 2000 8.971766244367 2001 9.15872701069041 2002 9.36728466109026 2003 9.5314092949522 2004 9.50081006689449 2005 9.29711934390873 2006 9.00934802937311 2007 8.63708970812896 2008 8.22943072844925 2009 7.84817795056635 2010 7.50393384155001 2011 7.18478550927188 2012 6.87650637026 2013 6.54380738979917 2014 6.15092145898434 2015 5.75137187459274 2016 5.4277843573523 2017 5.19216938570491 2018 5.05815938113018 2019 5.01488261247467 2020 5.04846784788552 2021 5.14242171476858 2022 5.7017470960706 2023 5.96130443806523