Year	% female
1971	40.83312
1972	41.85462
1973	42.31974
1974	42.0403
1975	41.66697
1976	42.57764
1977	42.18963
1978	42.41638
1979	42.28692
1980	41.7778
1981	41.46912
1982	41.37449
1983	41.50048
1984	41.66328
1985	42.11968
1986	42.79485
1987	42.93121
1988	42.15657
1989	42.31259
1990	41.97542
1991	41.98366
1992	42.34794
1993	43.32925
1994	41.4977
1995	42.86802
1996	42.82302
1997	43.89271
1998	44.44779
1999	44.51705
2000	44.94374
2001	45.82151
2002	45.99997
2003	47.00783
2004	46.5384
2005	46.34956
2006	45.94416
2007	45.8913
2008	45.94514
2009	46.03261
2010	46.14104
2011	46.39087
2012	46.11862
2015	49.21205
2016	49.21633
2017	49.06882