Year	% female
1971	49.64724
1976	50.13994
1977	49.74494
1978	50.43241
1979	49.95825
1980	52.22835
1981	52.17583
1982	53.48233
1983	52.61788
1984	52.25311
1985	52.16677
1987	47.01362
1988	46.63066
1989	46.55241
1990	46.38096
1991	46.03778
1992	45.51143
1993	49.44877
1994	49.96435
1995	48.84511
1996	49.12082
1997	49.70758
1998	52.68105
1999	56.8171
2000	57.04586
2001	56.78175
2002	55.14685
2003	53.31161
2004	53.6194
2005	43.65659
2006	43.88879
2007	44.11511
2008	44.22448
2009	44.10491
2010	43.82294
2011	43.88222
2012	43.08545
2013	50.17364
2014	49.82657
2015	51.29591
2016	51.20237
2017	51.46326