Year	% female
1971	50.75212
1972	48.18454
1973	49.96527
1974	49.57466
1975	50.26538
1976	50.6602
1977	49.67826
1978	49.38835
1979	49.52198
1980	50.23215
1981	49.40824
1982	50.08833
1983	52.00582
1984	51.86198
1985	55.64134
1986	55.82839
1987	53.62858
1988	53.00568
1989	52.7261
1990	52.875
1991	53.09181
1992	53.01292
1993	53.09476
1994	52.0872
1995	51.80422
1996	53.61782
1997	52.46952
1998	52.09653
1999	50.54437
2000	51.23748
2001	50.16479
2002	50.09367
2003	50.36615
2004	50.58111
2005	50.48326
2006	50.14839
2007	49.37547
2008	50.2139
2009	48.73055
2010	48.01444
2011	49.59644
2012	50.08599
2013	50.05947
2014	50.31141
2015	50.95567
2016	50.45623
2017	50.09116