Year	% female
1970	40.74771
1971	40.77365
1972	40.23273
1973	39.75217
1974	39.65742
1975	39.25628
1976	39.55234
1977	39.83867
1978	39.79117
1979	40.06228
1980	40.35007
1981	40.83652
1982	40.76585
1983	40.57581
1984	40.45841
1985	40.27598
1986	40.25701
1987	39.96784
1988	40.60671
1989	40.84229
1990	40.27599
1991	39.88974
1992	39.47918
1993	38.38267
1994	39.71555
1995	38.84957
1996	37.0217
1997	36.6461
1998	36.24919
1999	35.73177
2000	35.70287
2001	36.11778
2002	37.16195
2003	37.00625
2004	36.92024
2005	36.84916
2006	37.4487
2007	37.45883
2008	37.87646
2009	37.69566
2010	37.71482
2011	38.68981
2012	39.07932
2013	37.88509
2014	37.41001
2015	37.65453
2016	37.8446
2017	38.76426
2018	38.72988