Year	% female
1971	42.84896
1972	42.78322
1973	42.63972
1974	42.52438
1975	42.55644
1976	42.89162
1977	43.17553
1978	43.89635
1979	44.49691
1980	44.81312
1981	45.64723
1982	46.29279
1983	47.45756
1984	47.73245
1985	47.81426
1986	47.5867
1987	47.36237
1988	47.24495
1989	47.40642
1990	47.88274
1991	47.99184
1992	48.07713
1993	48.71218
1994	47.3498
1995	48.55305
1996	48.76742
1997	48.93758
1998	48.97229
1999	48.93376
2000	49.38111
2001	49.11401
2002	48.60637
2003	48.52644
2004	48.27101
2005	47.71968
2006	47.70487
2007	47.10621
2010	47.41048
2011	47.86062
2012	47.90341
2013	47.97009
2014	47.54822
2015	47.25979
2016	47.41126
2017	47.52477