Year	% female
1971	34.0351715087891
1972	33.681999206543
1973	34.3185615539551
1974	35.4067192077637
1975	37.3283996582031
1976	36.6083183288574
1977	41.2266693115234
1978	40.8096313476562
1979	43.3148193359375
1980	45.5643997192383
1981	48.4212799072266
1982	48.2503890991211
1983	57.8261795043945
1984	60.5187301635742
1985	63.4129486083984
1986	66.7525024414062
1987	66.2136077880859
1988	66.9911117553711
1989	69.0075531005859
1991	70.1285018920898
1992	71.3200607299805
1993	68.3197402954102
1996	70.9979019165039
1999	71.9279937744141
2000	72.4669494628906
2003	72.1554107666016
2004	72.155387878418
2007	68.8138275146484