Year	% female
1970	52.26337
1971	51.34228
1972	41.19718
1973	32.28346
1974	31.1828
1975	33.47107
1976	35.71429
1977	33.92857
1978	31.95592
1980	33.33333
1981	30.98827
1983	24.09471
1989	39.47368
1990	38.22526
1991	40.25974
1999	40.94319
2000	40.94319
2001	34.91773
2002	37.10692
2003	27.76724
2004	29.54405
2010	39.35255
2015	51.4