Year	% female
1971	32.64641
1972	32.30584
1973	29.02017
1974	27.45795
1975	27.4322
1976	26.43996
1977	24.96071
1985	22.29202
1988	22.12971
1990	20.8966
1991	21.38157
1992	22.88639
1993	23.56062
1994	25.46395
1995	24.89313
1999	35.57294
2000	37.60906
2001	36.88752
2002	36.67731
2003	37.63659
2004	37.39287
2005	37.83143
2006	37.74597
2007	36.94556
2008	35.29521
2009	35.02396
2010	34.12087
2011	33.39903
2012	33.92852
2013	33.95915
2014	34.72438
2015	34.50425
2016	35.64768
2017	33.9546