Year	% female
1970	47.92795
1971	48.50311
1972	46.80359
1973	48.18992
1974	48.20847
1975	48.2953
1978	48.97225
1981	47.15683
1982	47.79631
1984	49.83244
1985	50.51208
1986	49.48848
1990	47.97613
1991	48.95784
1993	47.7248
1998	50.75031
1999	50.02039
2000	49.40788
2001	49.24612
2002	49.79062
2006	48.37853
2007	40.39781
2008	49.22089
2009	54.49032
2010	49.73269
2011	47.04854
2012	48.93128
2013	48.56469
2014	49.80282
2015	48.91139