Year	% female
1970	26.56269
1974	30.29441
1975	28.34191
1976	28.17877
1977	28.2107
1984	35.22456
1986	35.56315
1987	34.50648
1988	34.96234
1989	36.00967
1990	37.98577
1991	38.56742
1992	38.52377
1993	39.13217
1994	39.40326
1995	39.18028
1998	40.08595
2012	41.46155
2016	40.67178