Year	% female
1971	42.92929
1972	42.44453
1973	43.98464
1974	44.43755
1975	45.01966
1976	45.66544
1977	45.89575
1978	46.21009
1979	46.51528
2007	48.85579
2014	49.58873
2015	49.29043