Year	% female
1970	41.1202
1971	39.05281
1972	36.44638
1973	37.71553
1974	35.94746
1975	38.30177
1978	45.87069
1979	46.36656
1980	26.67571
1981	47.51509
1982	47.51509
1983	44.80619
1984	42.67659
1985	43.53465
1986	38.26816
1987	43.8578
1988	47.07717
1989	46.66915
1990	47.99764
1991	48.9262
1992	47.68447
1994	47.00773
1995	46.40063
1996	44.70012
1998	58.7591
1999	43.37494
2000	41.85397
2001	42.79321
2002	44.91528
2004	45.33511
2005	45.76836
2006	45.8692
2007	42.87705
2008	43.91966
2009	45.72301
2010	45.82527
2011	42.25305
2012	42.38298
2013	42.71107
2014	42.32058
2015	41.52997
2016	40.6832
2017	40.48367