Year	% female
1970	33.58495
1971	33.85435
1972	34.22314
1973	34.60502
1974	35.05702
1975	35.92979
1976	36.29992
1977	36.2444
1978	36.57418
1979	36.83781
1980	37.04734
1981	37.45274
1982	37.476
1983	38.65107
1984	38.14701
1985	38.44149
1986	38.91437
1987	39.20195
1988	39.5584
1989	39.9549
1990	40.27997
1991	40.57085
1992	40.84481
1993	41.15426
1994	41.70781
1995	42.00996
1996	42.3437
1997	42.94557
1998	43.59349
1999	44.18383
2000	44.44431
2001	44.65174
2002	45.02893
2003	45.79909
2004	45.79118
2005	46.08173
2006	46.27437
2007	46.58312
2008	46.85811
2009	47.31682
2010	47.40601
2011	47.55126
2012	47.62276
2013	48.09685
2014	48.26262
2015	48.25398
2016	48.40487
2017	48.38188
2018	48.43648