Year	% female
1970	43.10245
1971	43.13812
1972	43.37212
1973	43.62655
1974	43.52414
1975	44.10802
1976	44.27062
1977	44.48283
1978	44.7457
1979	44.63678
1980	45.4833
1981	47.24316
1982	45.56538
1983	46.19705
1984	46.13086
1985	46.33508
1986	46.78304
1987	47.06902
1988	47.02698
1989	46.61938
1990	46.37142
1991	46.48902
1992	46.77381
1993	46.72523
1994	46.15471
1995	46.14521
1996	46.21265
1997	46.18247
1998	45.22278
1999	45.3265
2000	45.45351
2001	45.53627
2002	45.30923
2003	45.25521
2004	44.13557
2005	44.07774
2006	43.59176
2007	43.48796
2008	43.27766
2009	42.76518
2010	42.83875
2011	42.59603
2012	42.46051
2013	43.78524
2014	43.53338
2015	43.21119
2016	43.26123
2017	43.36933
2018	43.39265