Year % of female population 1960 11.3275331711124 1961 11.5666235936013 1962 11.8020240608158 1963 12.0236566533649 1964 12.2424551110891 1965 12.4502587680883 1966 12.6458821227356 1967 12.8607202113301 1968 13.1194886736219 1969 13.3959338177923 1970 13.6781745783979 1971 13.9627298852588 1972 14.2384802908341 1973 14.5224696046002 1974 14.8227258940223 1975 15.1165195477549 1976 15.3869258697332 1977 15.6729647351257 1978 15.9707902151129 1979 16.2331386284869 1980 16.4512785139142 1981 16.6448432788105 1982 16.8381092357639 1983 17.0283516803348 1984 17.1921561106657 1985 17.3884633094972 1986 17.6310598770766 1987 17.8053905544902 1988 17.9233007987305 1989 18.0213852296628 1990 18.0690568967305 1991 18.0700392467064 1992 18.0256780351264 1993 17.9285936530646 1994 17.801833764225 1995 17.6592952392446 1996 17.5202128483001 1997 17.3993117566974 1998 17.2844802992893 1999 17.1726511961813 2000 17.080655302113 2001 17.0130008151571 2002 16.9677479052226 2003 16.9545128819611 2004 16.9769887536768 2005 17.0361952874218 2006 17.1194473649924 2007 17.2683214153415 2008 17.5187003676682 2009 17.8513986098653 2010 18.2515450849703 2011 18.7103089405673 2012 19.1833502115818 2013 19.5913248852662 2014 19.9345514140001 2015 20.245254660421 2016 20.5168913819927 2017 20.7643150355812 2018 21.0123044964207 2019 21.259499909494 2020 21.5067173275686 2021 21.7352940526671 2022 21.9589147134707 2023 22.1920959008075