Year	% female
1970	13.69402
1971	12.62248
1972	11.44107
1973	12.1344
1974	11.82518
1975	12.03251
1976	12.98029
1977	14.41377
1978	14.94983
1980	18.28529
1981	20.09183
1982	29.81286
1984	30.27423
1985	29.96061
1986	31.87462
1988	31.55284
1991	32.15821
1993	25.79763
1994	20.34748
1995	25.37501
2001	0
2002	24.63293
2003	24.54432
2004	16.33462
2005	23.55217
2007	26.16887
2008	28.77228
2009	31.24845
2010	32.15398
2011	34.68783
2012	34.85363
2013	34.75782
2014	34.88299
2015	34.9509
2016	35.39947
2017	35.21791
2018	35.28181