Year % of female population 1960 36.7673750717978 1961 37.3552973033961 1962 38.0114240170032 1963 38.7314469230102 1964 39.5122572970217 1965 40.3039058764837 1966 41.0635875752155 1967 41.7682805735393 1968 42.3839261471626 1969 42.8652632775641 1970 43.1643482931708 1971 43.1760977818017 1972 42.8900260282947 1973 42.5084452143785 1974 42.107047793432 1975 41.6380611246538 1976 41.0138099106418 1977 40.2152391901386 1978 39.4699985837254 1979 38.8097090399876 1980 38.1930437728064 1981 37.6313625148497 1982 36.9908511730427 1983 36.3426584952875 1984 35.8180791631998 1985 35.365099009901 1986 34.9423641649744 1987 34.5068588296579 1988 33.9797337002479 1989 33.3612621952085 1990 32.6563357682726 1991 32.0644134966928 1992 31.6253390158853 1993 31.0713060188045 1994 30.5467372134039 1995 30.0251390671801 1996 29.4102131251319 1997 29.1785145957791 1998 29.0101156069364 1999 28.5292357831218 2000 28.0921457550903 2001 27.7130245015375 2002 27.3275883173795 2003 26.9423846907547 2004 26.559245337228 2005 26.2567781961119 2006 25.9607843137255 2007 25.668152092135 2008 25.3949008887415 2009 25.0420889687355 2010 24.649838043114 2011 24.2863295528586 2012 24.1234818476446 2013 24.1107359017791 2014 24.083976390979 2015 24.0639452621798 2016 24.1086534244 2017 24.1849032831073 2018 24.2182152525923 2019 24.2176994550436 2020 24.1545361712352 2021 24.0765924499459 2022 24.0046526757814 2023 23.8355306300222