Year	% female
1971	37.51338
1972	38.55773
1973	39.06908
1974	39.29248
1975	39.58818
1976	39.97285
1977	40.55784
1978	40.82729
1979	41.31333
1980	41.63594
1981	41.92442
1982	42.11381
1983	42.41725
1984	42.64468
1985	43.02108
1986	43.55161
1987	43.99758
1988	44.25746
1989	44.52067
1990	44.66128
1991	44.82984
1992	45.11591
1993	45.34537
1994	45.65302
1995	45.868
1996	46.11562
1997	46.29578
1998	46.49119
1999	46.64601
2000	46.75742
2001	46.81503
2002	46.98284
2003	46.95957
2004	47.01849
2005	46.99788
2006	47.03594
2007	47.23642
2008	47.30874
2009	47.28702
2010	47.33514
2011	47.36534
2012	47.54499
2013	47.66131
2014	47.73204
2015	47.76413
2016	47.69204
2017	47.72111
2018	47.82363