Year	% female
1971	14.54545
1973	14.35407
1974	8.87728
1975	19.67655
1976	21.59091
1977	21.70418
1978	23.56902
1979	19.93517
1980	18.05112
1981	19.61806
1983	38.37429
1984	36.53846
1985	34.38356
1986	34.6049
2008	47.29349
2009	47.60477
2010	46.31333