Year	% female
1971	50.72075
1972	50.2162
1973	50.23397
1974	50.19591
1976	50.55333
1977	50.57379
1978	51.15911
1979	50.56133
1980	50.75702
1981	51.11037
1982	51.06152
1984	51.09272
1985	51.11254
1986	52.26269
1987	51.80201
1991	51.78633
1992	51.64773
1993	51.99357
1995	54.961
1996	51.39588
1997	51.32731
1999	50.92632
2000	51.92317
2001	50.72321
2005	50.52114
2007	50.72024
2008	50.82457
2009	50.16452
2010	51.16492
2011	50.49086
2012	50.46937