Year	% female
1971	49.31298
1972	48.24087
1973	45.83739
1974	45.51249
1975	47.12631
1977	47.1494
1978	46.54143
1979	46.67069
1980	47.0589
1981	67.85415
1982	47.34981
1983	46.16366
1985	46.38169
1986	46.21089
1987	45.8043
1988	46.02032
1989	46.09671
1990	46.11912
1991	46.02772
1992	45.33671
1993	44.22197
1994	42.14782
1995	41.61624
1996	41.60752
1997	42.21415
1998	43.74456
1999	44.01951
2000	44.19242
2001	44.30557
2002	44.26246
2003	44.72221
2004	43.75486
2005	43.73495
2006	41.95249
2007	42.19293
2008	42.39284
2009	42.72825
2010	43.6087
2011	43.45315
2012	43.02622
2013	43.50014
2014	44.12051
2015	43.48833
2016	43.17108
2017	42.72571