Year	% female
1970	27.26455
1971	29.75333
1972	30.6417
1973	31.59017
1974	31.80138
1975	31.51334
1976	30.58655
1977	30.11441
1978	30.3344
1979	31.42211
1980	32.36754
1981	32.90849
1982	35.47057
1984	36.12597
1986	36.64305
1987	36.39679
1988	37.3633
1989	37.47486
1990	38.45726
1991	39.89081
1992	39.89111
1993	40.02844
1994	40.6012
1995	40.24093
1998	41.81428
2012	42.67673
2016	41.60009