Year	% female
1972	50.58651
1973	51.45172
1974	50.29051
1975	50.67265
1976	51.85885
1977	57.74156
1978	49.5637
1979	50.76661
1980	50.98814
1981	50.79096
1982	51.05909
1983	51.81406
1984	51.91538
1985	50.37164
1997	48.39978
1999	47.44526
2000	48.13052
2001	49.09677
2008	47.4313
2009	47.13337
2016	48.47619
2017	48.50814