Year	% female
1973	46.19838
1974	45.59519
1975	45.5651
1976	45.85073
1977	45.00405
1978	44.3885
1979	45.35281
1980	45.68713
1981	46.44124
1983	45.49175
1984	45.38407
1985	44.91068
1986	44.78153
1987	45.07407
1988	44.97455
1989	45.2129
1990	46.13598
1991	45.42737
1992	45.0147
1993	44.95082
1994	45.24888
1998	41.91764
1999	36.36233
2000	39.35696
2001	39.19289
2002	40.39419
2003	41.66045
2004	42.49419
2005	42.71068
2006	42.81296
2007	43.14125
2008	43.53823
2009	44.41546
2010	45.19727
2011	45.98453
2012	46.73107
2013	47.70188
2014	48.17846
2015	48.8186
2016	49.19216
2017	49.17842