Year	% female
1971	51.58599
1972	51.62204
1973	51.90116
1974	50.07094
1975	51.49555
1977	52.08159
1978	52.56329
1979	52.64951
1980	52.742
1981	49.33212
1982	52.94555
1983	53.30283
1985	52.48388
1986	52.34789
1987	52.28872
1988	51.97153
1989	51.85525
1990	51.73584
1991	51.37629
1992	51.52016
1993	51.44751
1994	51.32007
1995	51.34264
1996	51.44314
1997	51.13593
1998	50.43825
1999	50.52709
2000	50.54075
2001	50.56529
2002	50.57948
2003	50.5714
2004	50.86544
2005	50.83046
2006	50.56529
2007	50.5569
2008	50.51317
2009	50.43785
2010	50.39426
2011	50.38188
2012	50.39731
2013	50.37473
2014	50.30291
2015	50.27595
2016	50.28942
2017	50.29384