Year	% female
1971	49.54882
1972	48.15989
1973	47.30867
1974	46.86363
1975	47.79433
1976	50.21536
1977	50.01666
1978	50.13166
1979	50.25615
1980	50
1987	50
1988	50
1989	50
1990	50
1993	50.92234
1994	50.91643
1995	50.34919
1996	50.05382
1997	49.95244
1998	50.4193
1999	50.26413
2000	49.92542
2001	49.93032
2002	49.80759
2003	49.63193
2004	49.17944
2005	49.19647
2006	49.22148
2007	49.28358
2008	49.51162
2009	49.34804
2010	49.4952
2011	49.66909
2012	49.67731
2013	49.74676
2014	49.82587
2015	49.93945
2016	49.94611
2017	49.96531
2018	49.88064