Year	% female
1971	36.77306
1972	37.83661
1973	38.32838
1974	39.34701
1975	39.30228
1976	39.65744
1977	40.24252
1978	40.39931
1979	40.78561
1980	41.18598
1981	41.59939
1982	41.88671
1983	42.32026
1984	42.76854
1985	39.27933
1986	39.28632
1987	43.85571
1988	42.34471
1990	41.29818
1991	42.63031
1992	42.99695
1993	43.58186
1994	42.58086
1995	40.5848
1998	42.48816
1999	47.37604
2002	43.8566
2007	44.75871
2008	45.46108
2009	45.9486
2010	46.28127
2011	46.26184
2012	46.57256
2013	47.22433
2014	47.28286
2015	49.46434