Year	% female
1971	51.781
1972	51.39003
1973	52.04272
1977	50.58685
1982	50.34498
1983	50.43776
1984	50.43274
1985	50.13046
1987	50.07184
1988	49.77965
1989	50.18685
1990	50.21532
1991	50.33079
1992	49.91616
1993	50.14759
2004	51.07088