Year	% female
1971	47.54444
1972	38.99045
1973	37.42763
1974	39.78525
1976	49.81004
1984	27.28551
1985	25.6676
1986	33.74709
1987	25.32768
1999	42.48821
2001	45.89372
2003	51.94131
2005	44.97945
2007	30.61081
2008	42.73859
2009	46.81716
2010	43.39129
2011	47.63268
2012	41.44679