Year % of female population 1960 13.108237632379 1961 13.2778825774405 1962 13.3877763216324 1963 13.525652457598 1964 13.7440603470866 1965 14.0030481062724 1966 14.2369211544133 1967 14.453682451408 1968 14.6870330011918 1969 14.8711970153917 1970 15.0216157831762 1971 15.186920749737 1972 15.3699053904599 1973 15.5264882982042 1974 15.6820182025416 1975 15.8381898765162 1976 15.9404256969948 1977 16.0355485374261 1978 16.100978263571 1979 16.1279635113948 1980 16.0767680410129 1981 15.8712178943202 1982 15.5731509268753 1983 15.3232349967674 1984 15.11294631415 1985 14.8788950656732 1986 14.7806333826155 1987 14.8219211081729 1988 14.9072935488817 1989 15.0589466412118 1990 15.2576365965487 1991 15.4998594618229 1992 15.8814279358075 1993 16.3699103689262 1994 16.8174452203685 1995 17.2287519401313 1996 17.6498346739528 1997 18.0672810635513 1998 18.377824769809 1999 18.6073469747104 2000 18.873365021688 2001 19.1891988504421 2002 19.5960964902463 2003 20.0331538070599 2004 20.4539218430165 2005 20.8531390869177 2006 21.2897048415969 2007 21.6499508316799 2008 21.7632084413242 2009 21.7925915336218 2010 21.8335423497191 2011 22.0024205471283 2012 22.3462186636732 2013 22.7327956403735 2014 23.1489234022489 2015 23.5221672234488 2016 23.8683410253658 2017 24.2098968776855 2018 24.4583518784338 2019 24.7101330150312 2020 25.0065930201893 2021 25.2024070530922 2022 25.4086556753784 2023 25.714258957907