Year	% female
1971	29.23294
1972	26.83955
1973	30.92341
1977	31.38748
1978	36.36364
1979	39
1981	37.71626
1982	37.8933
1983	31.3059
1984	27.24832
1985	33.7415
1986	34.55285
1987	34.13015
1988	32.69494
1989	31.60434
1990	27.33612
1991	28.97092
1992	19.9637
1993	16.42442
2004	27.57848