Year	% female
1970	38.8109
1971	39.22369
1972	38.15877
1973	39.22532
1974	39.91001
1975	40.73778
1976	41.00643
1977	41.80262
1978	42.51335
1979	44.65292
1981	41.79932
1982	41.11063
1983	40.71666
1984	40.40842
1985	40.43611
1986	40.30259
1987	41.41012
1988	41.79622
1989	42.29962
1990	46.69382
1991	43.99896
1992	44.00649
1993	44.40106
1994	45.0067
1995	45.60846
1996	46.17614
1999	46.93046
2000	46.81473
2001	47.01416
2002	46.92862
2003	47.52008
2012	49.31144
2013	49.57466