Year	% female
1971	47.59255
1972	47.8272
1973	48.34157
1974	48.48299
1975	48.59275
1976	48.80204
1977	48.84201
1978	48.81037
1979	48.96905
1980	49.22367
1981	49.14142
1982	49.24633
1983	49.28092
1984	49.33827
1985	49.40804
1986	49.27917
1987	49.71403
1988	49.46757
1989	49.67661
1992	49.61
1994	49.57621
1995	49.54052
1996	49.62404
1997	49.5462
1999	49.65994
2001	49.57511
2002	49.45276
2003	49.45428
2011	48.82527