Year	% female
1971	27.64658
1972	28.13549
1973	29.1961
1974	30.42174
1975	31.45683
1976	33.67485
1977	35.1802
1978	35.57649
1979	36.09676
1980	36.45194
1981	36.64253
1982	37.26337
1983	37.62435
1984	38.38816
1985	39.65617
1986	40.11538
1987	41.08388
1988	41.53318
1989	42.17779
1990	42.54406
1991	43.11953
1992	44.20731
1993	44.95694
1994	46.06599
1995	46.56275
1996	47.12942
1997	47.70292
1999	49.26002
2000	50.25591
2001	50.18783
2002	49.86018
2003	50.65118
2005	51.05432
2006	50.99194
2008	50.59766
2009	50.48842
2010	50.38128
2011	49.83583
2016	51.36858