Year	% female
1971	46.83685
1972	46.05263
1973	45.99816
1974	46.36771
1975	47.45614
1976	47.48142
1977	47.25635
1978	45.98842
1979	47.03425
1980	47.71987
1981	48.64643
1982	45.56869
1983	44.72285
1984	45.97156
1985	47.46032
1986	47.83654
1987	53.01095
1988	51.87557
1989	51.05796
1990	51.87901
1991	55.50239
1992	52.39961
1993	51.04895
1994	49.79879
1996	50.47259
1997	50.8937
2000	49.2915
2008	54.21053
2009	52.69122
2010	52.77931
2011	52.92853
2012	53.23703
2018	44.14239