Year % of female population 1960 25.3643902422489 1961 25.3011185364916 1962 25.1070470453722 1963 24.7831330566067 1964 24.3873853360798 1965 23.9828042940546 1966 23.5994540077018 1967 23.1996861425688 1968 22.7542379022846 1969 22.282681217641 1970 21.813219608139 1971 21.4041257727385 1972 21.0853945608503 1973 20.8383758973635 1974 20.6214892384547 1975 20.4173821159688 1976 20.2378947262044 1977 20.0933482993679 1978 19.9902262369384 1979 19.9116031464892 1980 19.8174313176336 1981 19.7122810250428 1982 19.6460168298956 1983 19.6277942065157 1984 19.6174880442215 1985 19.5881449897 1986 19.5001802644333 1987 19.3430829637039 1988 19.1460845990201 1989 18.9183728086985 1990 18.6806359409391 1991 18.4533207304153 1992 18.1757417248209 1993 17.7966612901111 1994 17.3929620804482 1995 17.0849868649604 1996 16.9002676805219 1997 16.7565071969078 1998 16.5979881289218 1999 16.4189990124241 2000 16.2336190816031 2001 16.0224934096842 2002 15.7722650675583 2003 15.521329999748 2004 15.2916811389464 2005 15.0980340245944 2006 14.9202035547856 2007 14.7656733184946 2008 14.6603702152198 2009 14.5663202504044 2010 14.4479803772646 2011 14.2789142748571 2012 14.0846332694317 2013 13.903847560185 2014 13.7503046280195 2015 13.6300377666735 2016 13.5447987949669 2017 13.4984717269485 2018 13.4783203884221 2019 13.4690413768016 2020 13.4354579620861 2021 13.3879777486251 2022 13.341782285498 2023 13.2608969116789