Year	% female
1971	53.5014991760254
1972	54.1901702880859
1973	70.4784927368164
1974	70.8631134033203
1975	71.6736831665039
1976	71.5598068237305
1977	71.504280090332
1978	71.0177688598633
1979	70.7802124023438
1981	69.9932174682617
1984	71.8306732177734
1986	70.942268371582
1987	71.3562393188477
1988	71.7272415161133
1989	72.2710571289062
1991	73.7380981445312
1992	74.1687469482422
1993	74.448371887207
1995	76.0874862670898
1996	76.1672897338867
1997	76.8940200805664