Year	% female
1970	6.03619
1971	7.28247
1972	8.61331
1973	10.82965
1974	11.98148
1975	10.92282
1976	7.63484
1977	11.3271
1978	11.12211
1979	7.97784
1981	14.12056
2003	3.64501
2004	4.12297
2005	10.06548
2007	11.09459
2008	7.99712
2011	6.36439
2012	11.81092
2013	7.31707
2014	7.68216
2015	9.73838
2016	12.77069
2017	12.77034
2018	13.15405