Year	% female
1971	42.30573
1972	42.93664
1973	43.48827
1974	43.93372
1975	44.34105
1976	44.567
1977	44.74428
1978	44.98582
1979	45.11106
1981	45.41016
1982	46.03246
1984	46.69849
1985	47.03746
1986	47.18936
1987	47.12683
1988	47.15271
1989	47.09241
1990	47.09725
1991	47.07007
1992	47.08003
1993	47.16663
1994	47.38229
1995	47.40454
1997	47.16735
1999	46.9714
2000	46.96787
2001	47.2118
2002	47.40866
2003	47.52749
2004	47.75011
2005	47.85957
2006	48.07867
2007	48.2723
2008	48.39254
2009	48.57516
2010	48.67974
2011	48.7715
2012	48.6408
2013	48.82417
2014	48.87686
2015	48.81608
2016	48.81839
2017	48.69883