Year	% female
1970	66.18337
1971	62.00888
1972	56.58795
1973	49.14317
1975	23.3631
1976	24.03377
1977	43.54155
1978	45.12809
1985	39.61186
1986	39.59795
1987	40.3369
1988	36.9955
1989	40.07778
1990	45.03229
1991	44.07534
1993	43.02232
1994	43.24801
1996	52.06876
1998	48.62296
1999	48.60612
2000	49.22198
2001	47.34703
2002	45.8583
2003	46.67549
2004	46.04566
2005	47.34547
2006	48.07456
2007	48.60298
2008	49.25678
2009	49.59635
2010	49.76921
2011	50.41661
2012	49.52744
2016	49.42603