Year	% female
1975	42.28824
1976	44.27495
1977	44.64645
1978	45.29318
1979	46.77541
1980	46.359
1981	46.05739
1982	46.65449
1983	47.15567
1984	46.60767
1985	44.72375
1986	44.73073
1987	46.46597
1988	46.21723
1989	46.28374
1990	44.53777
1991	44.65695
1992	44.42719
1993	44.17934
1994	46.5461
1995	46.77808
1996	47.09887
1997	46.07857
1998	46.60742
1999	46.87656
2000	46.70044
2001	46.44314
2002	46.03632
2003	46.17748
2004	46.85582
2005	47.85881
2006	48.33098
2007	48.33008
2008	48.32278
2009	48.42507
2010	45.06171
2011	44.94462
2012	44.94427
2013	45.02099
2014	44.81482
2015	44.77546
2016	44.25158
2017	43.73979
2018	43.07182