Year	% female
1970	36.96422
1971	38.3998
1972	39.08572
1973	39.9701
1976	40.16555
1977	42.57629
1978	43.35364
1979	43.14787
1980	43.49364
1981	43.70019
1982	43.38831
1983	42.97777
1984	43.03524
1985	44.02033
1986	44.28917
1987	44.38541
1988	42.41325
1989	44.99404
1990	43.19442
1991	43.80504
1992	44.1182
1993	43.72752
1994	44.06524
1995	44.54369
1996	45.29037
1999	43.82962
2000	43.93096
2001	44.41843
2002	44.38571
2003	44.56645
2004	44.73376
2005	44.88431
2006	45.35844
2007	45.98803
2008	46.13584
2009	46.34568
2010	46.66385
2011	47.30454
2012	48.36981
2013	48.36981
2014	48.62336
2016	47.49777