Year % of female population 1960 0.176427169784147 1961 0.18675452351169 1962 0.201252624091327 1963 0.22075055187638 1964 0.246871829556983 1965 0.277819618081706 1966 0.310270449643272 1967 0.342109177450543 1968 0.378744025271654 1969 0.417681865645667 1970 0.455717255717256 1971 0.497886488563648 1972 0.539178045604781 1973 0.580577931422333 1974 0.619382252001961 1975 0.657045072969134 1976 0.696100238434334 1977 0.736873935670746 1978 0.77887537993921 1979 0.818923430659233 1980 0.855557993042715 1981 0.946421344291897 1982 1.06210537690847 1983 1.14975963746594 1984 1.25585355470413 1985 1.36938574566386 1986 1.50121945677367 1987 1.65483915085021 1988 1.7933390264731 1989 1.86063480481576 1990 1.81451612903226 1991 1.67642900424157 1992 1.59708406950376 1993 1.59140479844899 1994 1.54668678616958 1995 1.49529887097383 1996 1.48729702052958 1997 1.50817271352986 1998 1.50842336568394 1999 1.47390151052708 2000 1.42861774209235 2001 1.38200008478528 2002 1.34743840356251 2003 1.3292264439575 2004 1.31247826175911 2005 1.29315578580969 2006 1.27160580220132 2007 1.26391042034896 2008 1.30285535965049 2009 1.38579916986874 2010 1.49188324060666 2011 1.59870140900897 2012 1.70626127768584 2013 1.84327099512539 2014 1.99161810929544 2015 2.1385253750399 2016 2.2879337974993 2017 2.43024950081848 2018 2.56366708083418 2019 2.69491947239307 2020 2.82579580831419 2021 2.92209233172672 2022 2.98638754620415 2023 3.08759448643842