Year	% female
1972	50.07559
1973	43.6719
1974	47.99592
1975	41.49202
1976	45.08532
1977	40.29804
1978	41.06524
1979	36.17503
1986	47.60962
1987	48.53057
1988	50.90992
1989	48.90943
1990	52.68608
1991	47.93909
1992	49.68426
1993	53.73365
2001	47.6443
2002	52.63432
2005	50.2952
2006	50.91867
2007	50.63403
2008	49.10204
2009	46.737
2010	48.40183
2011	51.25446
2012	51.23812
2013	49.73979
2014	49.76333
2015	46.45006