Year	% female
1971	27.04797
1972	28.6515
1973	34.91223
1974	29.60284
1975	40.74441
1976	42.83943
1977	43.80094
1978	44.6882
1979	38.09323
1980	46.70434
1981	46.06215
1982	42.07299
1983	49.38645
1984	46.72619
1985	47.59409
1986	51.16743
1987	50.99003
1988	51.35856
1989	50.82132
1990	48.46876
1991	49.17887
1992	51.24487
1993	51.53483
1994	51.51269
1995	51.85998
1996	52.48076
1997	49.91682
1998	50.70089
1999	52.20833
2000	51.28168
2001	49.83248
2002	49.87006
2003	47.59335
2004	48.0255
2005	49.34601
2006	49.54108
2007	50.18308
2008	49.20643
2009	47.6227
2010	46.6223
2011	45.85411
2012	45.88001
2013	46.018
2014	45.54112
2015	45.26079
2016	45.89715
2017	46.37332