Year	% female
1971	29.01887
1972	31.19635
1973	27.26123
1974	27.61949
1975	34.26932
1976	27.37284
1977	25.89891
1978	24.95248
1979	26.31517
1980	31.36457
1981	16.6378
1982	17.01788
1983	15.57612
1984	15.50516
1985	22.17172
1986	21.89943
1987	32.78209
1988	30.52868
1989	31.95743
1990	30.92852
1991	26.66084
1992	28.26675
2006	39.18377
2007	34.65764
2008	34.69286
2009	40.58613
2010	41.35554
2011	41.64246
2012	42.75822
2013	42.98569
2014	44.24286
2015	34.33709
2016	34.88962
2017	34.09006
2018	33.49374