Year	% female
1970	43.53116
1971	43.49996
1972	43.40457
1973	43.30527
1974	43.23391
1975	45.01906
1976	45.94198
1977	46.18429
1978	46.15982
1979	46.0188
1980	46.04074
1981	45.91314
1982	45.61169
1983	45.46519
1984	45.58724
1985	45.68567
1986	46.32365
1987	46.49884
1988	46.70988
1989	46.8717
1990	47.08483
1991	47.21158
1992	47.39626
1993	47.43452
1994	47.51273
1995	47.64679
1996	47.73587
1997	47.80411
1998	47.84379
1999	47.8441
2000	47.8342
2001	47.86555
2002	47.81418
2003	47.75174
2004	47.65433
2005	47.55213
2006	47.47547
2007	47.4039
2008	47.33451
2009	47.28232
2010	47.23056
2011	47.21184
2012	47.22279
2013	47.3681
2014	47.44385
2015	47.36998
2016	47.45274
2017	47.46026
2018	47.48963