Year	% female
1970	39.36603
1971	39.81697
1972	38.98012
1973	39.97402
1974	40.50121
1975	41.49989
1976	41.88793
1977	42.61502
1978	43.32329
1979	45.30896
1981	42.04928
1982	41.19317
1983	40.77867
1984	40.44806
1985	40.4722
1986	40.33103
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