Year % of female population 1960 18.3115884701875 1961 18.3849279724156 1962 18.4494597466341 1963 18.5095270007745 1964 18.5666886396099 1965 18.6160744997899 1966 18.6562122640348 1967 18.6834880871064 1968 18.697988881447 1969 18.7138038151205 1970 18.7454277252936 1971 18.793728146238 1972 18.855648203981 1973 18.9275635254056 1974 19.0058915488622 1975 19.0787234065926 1976 19.1292656712648 1977 19.1626923255759 1978 19.1858106172164 1979 19.1780850269166 1980 19.1213135993866 1981 19.0268596254038 1982 18.9097935403678 1983 18.791841197435 1984 18.657047918347 1985 18.5142745255285 1986 18.3731433514069 1987 18.2247508684248 1988 18.0635506582273 1989 17.8945193886372 1990 17.7489214581143 1991 17.623870321985 1992 17.5175371398534 1993 17.4371343110586 1994 17.3763882266348 1995 17.3036848793709 1996 17.2088925519968 1997 17.1527041142964 1998 17.168840262163 1999 17.2353829964597 2000 17.3096032547978 2001 17.3428759845862 2002 17.3654936918308 2003 17.4098404929875 2004 17.4744677315169 2005 17.554973386733 2006 17.6142841548207 2007 17.6290158452232 2008 17.6019102515017 2009 17.5279791690467 2010 17.3951420315544 2011 17.2140561858867 2012 17.0116365484871 2013 16.8362616503359 2014 16.7163739589939 2015 16.6351569929439 2016 16.5843771801367 2017 16.5671065205243 2018 16.5340217851682 2019 16.4415186897167 2020 16.3171397003765 2021 16.1813311290903 2022 16.0401526050631 2023 15.8968841185744