Year	% female
1970	28.93733
1971	28.58669
1972	27.1792
1973	27.84615
1974	27.59104
1975	23.01542
1980	36.00309
1981	38.96128
1982	39.82236
1983	40.19637
1984	27.83803
1985	30.36479
1986	33.7636
1987	35.07828
1988	34.90623
1999	38.99823
2000	29.19571
2001	25.34107
2002	30.38052
2003	31.9793
2004	41.95804
2005	51.93559
2006	61.91182
2007	61.9139
2008	59.07331
2009	57.81649