Year	% female
1971	38.42451
1972	38.89733
1973	39.45352
1974	39.36632
1975	39.26089
1976	38.91197
1977	38.62464
1978	38.99713
1979	38.76598
1980	39.06587
1981	38.4551
1982	38.87249
1983	38.09615
1984	37.94148
1985	38.12101
1987	40.96418
1988	39.66454
1989	39.56303
1990	39.55093
1991	38.76045
1992	39.05304
1994	40.41404
1995	41.38659
1999	44.13237
2000	44.47306
2001	45.11831
2002	45.3323
2003	45.54731
2004	44.95206
2005	45.00218
2006	44.78892
2007	45.74333
2008	45.92815
2009	46.04905
2011	46.40236
2012	46.63036
2013	47.02791
2014	47.69137
2015	48.01834
2016	48.56851
2017	48.82622
2018	49.19336
2019	49.49812