Year	% female
1971	42.54479
1972	43.32261
1973	43.6173
1974	43.94681
1975	44.14169
1976	44.53193
1977	44.80551
1978	44.9278
1979	45.26304
1980	45.41825
1981	45.45851
1982	45.55138
1983	45.53524
1984	45.57803
1985	45.50522
1986	45.61141
1987	45.77519
1988	45.85092
1989	45.87892
1990	45.95451
1991	46.03421
1992	47.67945
1994	47.10167
1995	47.11376
1996	45.91354
1997	46.25341
1998	45.11364
1999	44.86586
2000	45.74368
2001	46.15645
2002	45.93021
2003	45.69568
2004	45.78869
2005	45.24648
2006	45.24646
2007	45.88013
2008	45.87267
2009	46.05535
2010	46.00207
2011	46.16698
2012	46.35875
2014	46.75854
2015	46.95594
2016	47.00528
2017	46.99812
2018	47.0142