Year	% female
1970	43.65731
1971	44.03527
1972	44.04214
1973	44.86388
1974	45.61369
1975	46.44448
1976	47.11429
1977	48.06686
1978	48.83837
1979	48.88406
1980	48.86979
1981	48.8636
1982	49.10832
1983	49.0592
1984	49.03562
1985	48.93032
1986	49.04376
1987	49.08764
1988	49.02794
1989	49.03707
1990	49.08962
1991	49.23362
1992	49.23753
1993	49.18514
1994	49.12704
1995	49.31258
1996	49.21943
1997	49.31043
1998	49.56192
1999	49.47766
2000	49.30622
2001	49.28932
2002	49.10886
2003	49.19508
2004	49.62722
2005	49.64403
2006	49.4936
2007	49.60736
2008	49.58303
2009	49.74251
2010	49.67084
2011	49.60046
2012	49.62118
2013	49.64947
2014	49.73779
2015	49.72035
2016	49.5952
2017	49.55404
2018	49.55188