Year	% female
1973	17.71787
1976	7.16793
1977	8.0301
1979	8.85423
1980	8.40937
1981	6.93241
1984	24.57284
1985	25.38394
1986	15.72194
1987	15.20449
1988	17.0648
1989	14.08823
1990	14.01903
1998	23.41681
1999	23.82906
2000	24.75727
2001	25.23314
2002	25.59218
2003	26.45538
2004	27.0964
2005	29.70321
2006	29.24422
2007	30.05525
2008	30.05551
2009	29.86916
2010	24.72807
2011	32.87114
2012	33.31007
2013	33.28794
2015	27.36015
2016	27.59047
2017	27.31256
2018	27.64044