Year % of female population 1960 0.243521513534319 1961 0.248494030141005 1962 0.252996005326232 1963 0.256599073606887 1964 0.260250831387533 1965 0.263944190969108 1966 0.267903487768531 1967 0.272182241991796 1968 0.276864680655688 1969 0.281589364231226 1970 0.285228313489467 1971 0.288559147361291 1972 0.292059886385882 1973 0.295863560327573 1974 0.320065409005703 1975 0.363897263918224 1976 0.407825115086716 1977 0.452806643990999 1978 0.498405366765644 1979 0.543796702602932 1980 0.588027125785957 1981 0.629406875487996 1982 0.667067923368507 1983 0.70561451126091 1984 0.726689069136821 1985 0.728726310643315 1986 0.731816034754609 1987 0.735781023706482 1988 0.73976892888245 1989 0.743659552913895 1990 0.747857047030313 1991 0.751692634729334 1992 0.749921901468252 1993 0.732167380206427 1994 0.709235026437965 1995 0.698976510080502 1996 0.69641527282974 1997 0.693832053132948 1998 0.692122974445307 1999 0.693397520569992 2000 0.69665987623477 2001 0.701473320555847 2002 0.708474837363407 2003 0.696204840724586 2004 0.665552215735525 2005 0.636939648156487 2006 0.610215354520069 2007 0.585644491522815 2008 0.563325689866326 2009 0.543125960041222 2010 0.524362095936194 2011 0.507699254485552 2012 0.493741675201839 2013 0.481110048615029 2014 0.469187129106011 2015 0.457837207171006 2016 0.447363333866266 2017 0.43781846891226 2018 0.428728074187643 2019 0.421547932251112 2020 0.414038433895277 2021 0.402812337837792 2022 0.390980960639338 2023 0.383289455502136