Year % of female population 1960 30.4196208212404 1961 30.3480464138253 1962 30.1780967304651 1963 30.0660975888234 1964 30.1927955909376 1965 30.4282125092245 1966 30.5040704736207 1967 30.448896906308 1968 30.3737233617442 1969 30.3759743158151 1970 30.4467633157909 1971 30.4873695994289 1972 30.4584976129908 1973 30.4515872227397 1974 30.4701128024064 1975 30.4333556167165 1976 30.3481818472389 1977 30.2459010573106 1978 30.1175478499517 1979 29.9553527813557 1980 29.7907824673546 1981 29.6408256763801 1982 29.4789077416857 1983 29.2781458462449 1984 28.9718506321697 1985 28.5694486230906 1986 28.1493916424872 1987 27.7107370476099 1988 27.2306679239218 1989 26.7387186407025 1990 26.2239618528206 1991 25.7041703176365 1992 25.1921692188242 1993 24.6258595346161 1994 23.9838879188701 1995 23.3179840078909 1996 22.701534984327 1997 22.1487019138732 1998 21.6835640615178 1999 21.3226339683478 2000 21.0071847221625 2001 20.6849069013976 2002 20.4205446063622 2003 20.269613226385 2004 20.1429585967081 2005 20.0049687407608 2006 19.8541339730187 2007 19.790106529573 2008 19.9156877488382 2009 20.1626066969594 2010 20.4601593962255 2011 20.7084425844323 2012 20.8421181055458 2013 20.8650175342267 2014 20.7910703821452 2015 20.6694771496452 2016 20.5171118848032 2017 20.3204977358101 2018 20.0762931143999 2019 19.785825293013 2020 19.5152661318354 2021 19.2660061766405 2022 18.9508761972499 2023 18.5706381748977