Year	% female
1971	37.6482
1972	38.27878
1973	37.77504
1974	39.04577
1975	40.81226
1976	40.23138
1977	39.74788
1978	40.2234
1979	30.9555
1980	30.7921
1986	36.59118
1988	35.2472
1990	33.0904
1991	36.49377
1993	45.91293
1994	45.15033
1995	45.80937
1996	46.02552
1998	44.43978
1999	44.60002
2000	44.50604
2001	44.36463
2002	44.07588
2003	45.83794
2004	42.9451
2005	42.11853
2006	41.54112
2007	42.22224
2008	42.40098
2009	42.59656
2010	42.13021
2011	41.86556
2012	41.38241
2013	42.6942
2014	42.0614
2015	42.07781
2016	41.98171
2017	42.34492