Year	% female
1971	19.90238
1972	20.74227
1973	22.2666
1974	22.57933
1975	23.56941
1976	23.33493
1977	23.91378
1978	24.17136
1979	26.12615
1980	25.69587
1981	25.76511
1982	25.85899
1983	24.93347
1984	24.99771
1985	25.54093
1986	27.05283
1987	27.52044
1988	27.98022
1989	28.27185
1990	28.25527
1991	31.06957
1992	32.12149
2006	42.3496
2007	41.79916
2008	41.77509
2009	42.76988
2010	42.02789
2011	41.31563
2012	40.66601
2013	40.47632
2014	42.30656
2015	42.31326
2016	42.8194
2017	42.83845
2018	44.01411