Year	% female
1970	47.76449
1971	48.38229
1972	48.39615
1973	48.41968
1974	49.00778
1975	51.1547
1976	50.3297
1977	49.60456
1978	49.5387
1979	49.92399
1980	49.84859
1981	49.99174
1982	50.00518
1983	50.00967
1984	50.08448
1985	49.66802
1986	50.27253
1987	50.35805
1988	50.44558
1989	50.52448
1990	50.6359
1991	50.72565
1992	50.82843
1993	50.84131
1994	50.83774
1995	50.87588
1996	50.70522
1997	50.74021
1998	50.71424
1999	50.7536
2000	50.80545
2001	50.86283
2002	50.90198
2003	50.82676
2004	51.02731
2005	51.07638
2006	51.13779
2007	51.09368
2008	51.10384
2009	51.00241
2010	50.85601
2011	50.75366
2012	50.5929
2013	50.45275
2014	50.3145
2015	50.16136
2016	49.99302
2017	49.90708
2018	49.90016