Year % of female population 1960 28.509689024362 1961 28.1069050514931 1962 27.3264984927632 1963 26.2132300169135 1964 25.133529027608 1965 24.3266692077319 1966 23.6582656736641 1967 23.1557605704367 1968 22.92494323847 1969 22.7638564299367 1970 22.6701086020188 1971 22.6534408239703 1972 22.7415039737977 1973 22.872864014893 1974 22.9777265396454 1975 23.0300558836876 1976 23.013377581788 1977 22.9306812293617 1978 22.7779294409836 1979 22.5465984564771 1980 22.2313974213045 1981 22.0174535432304 1982 21.7343996293817 1983 21.2678295855078 1984 20.81679388907 1985 20.3316762522604 1986 19.7808100015652 1987 19.1678294585009 1988 18.5057137136715 1989 17.8232163558435 1990 17.1850650391838 1991 16.6262334239162 1992 16.1366037735014 1993 15.6939877674306 1994 15.3106249757622 1995 14.9805216639731 1996 14.6967025651769 1997 14.4515796183831 1998 14.2153591412213 1999 13.9850285260234 2000 13.7777209447329 2001 13.6067538869991 2002 13.4483135476333 2003 13.2889102580271 2004 13.1513327153228 2005 13.0414902902531 2006 12.9436822773987 2007 12.8554548585092 2008 12.7783484739434 2009 12.6853850654811 2010 12.5855023074869 2011 12.4912113847696 2012 12.3894160194415 2013 12.2872029284359 2014 12.1810671919956 2015 12.0641097388455 2016 11.9397771548514 2017 11.8003124447067 2018 11.6451800392118 2019 11.4816460803324 2020 11.329947234563 2021 11.1923847379355 2022 11.0461375690176 2023 10.8976093251856