Year	% female
1970	38.10035
1971	38.71923
1972	40.16512
1973	40.87978
1974	40.4804
1975	41.20255
1976	41.42494
1977	39.93695
1978	39.93413
1979	40.3326
1980	40.41436
1981	41.94385
1982	41.63604
1983	41.75869
1984	42.13861
1985	42.36724
1986	42.14928
1987	41.73329
1988	41.98866
1989	42.27051
1990	42.04286
1991	40.67747
1992	39.52781
1993	39.78536
1994	40.53504
1995	40.926
1996	41.32511
1997	41.22535
1998	41.74732
1999	41.99684
2000	42.43338
2001	42.62991
2002	42.22784
2003	42.61698
2004	42.49713
2005	43.37957
2006	43.5059
2007	43.3861
2008	43.32516
2009	43.19466
2010	42.94525
2011	42.94502
2012	42.79322
2013	42.04531
2014	42.43665
2015	42.9855
2016	43.14554
2017	42.16031
2018	41.96907