Year % of female population 1960 23.7219967206722 1961 23.6442802920097 1962 23.4409255772403 1963 23.2689282920142 1964 23.1951264787298 1965 23.2068825342719 1966 23.2561025172547 1967 23.3321320428059 1968 23.3987667293952 1969 23.4421921367317 1970 23.4363719206164 1971 23.3804855095253 1972 23.3328861035541 1973 23.2967841991143 1974 23.2186343934882 1975 23.0541831092279 1976 22.8103007546349 1977 22.5025690510595 1978 22.110942480086 1979 21.6155639411173 1980 21.0752663563893 1981 20.5128783294244 1982 19.9561642337865 1983 19.4432426583584 1984 18.9075963680367 1985 18.3683320121346 1986 17.8214844489275 1987 17.2540805150363 1988 16.7138428387346 1989 16.185042468567 1990 15.6867465076383 1991 15.0315999267073 1992 14.489548477027 1993 14.2567976846887 1994 14.0512153572909 1995 13.8862297037771 1996 13.7573101408182 1997 13.6564524233719 1998 13.5732064565451 1999 13.5113454558162 2000 13.4599394386029 2001 13.4110097527216 2002 13.3945288597883 2003 13.3696926178761 2004 13.3292605899608 2005 13.3124105016905 2006 13.2974119591778 2007 13.2683691330117 2008 13.2490900425356 2009 13.2521220269708 2010 13.2400578540134 2011 13.2056913186269 2012 13.1722982766422 2013 13.1266944957088 2014 13.0472262343555 2015 12.9421967871572 2016 12.8188513261163 2017 12.6887714814882 2018 12.5387243380922 2019 12.3595285392672 2020 12.1748603907453 2021 11.9878282636563 2022 11.786096469891 2023 11.5737615201373