Year	% female
1972	55.51443
1973	58.20306
1974	55.68319
1975	58.01207
1976	56.16065
1977	54.53386
1978	55.05311
1979	55.35689
1986	56.28501
1987	56.59744
1988	56.8215
1989	56.51101
1990	56.30933
1991	56.50186
1992	56.39825
1993	53.0013
1994	57.2588
2001	57.88788
2002	61.04059
2005	60.61628
2006	60.43748
2007	62.03156
2008	61.2008
2009	61.09619
2010	60.59695
2011	60.12589
2012	59.78648
2013	60.2924
2014	60.61776
2015	61.24706