Year	% female
1971	40.96281
1972	41.13335
1973	41.39841
1974	41.97227
1975	42.65722
1976	43.29336
1977	44.01016
1978	44.99322
1979	46.10693
1980	46.98335
1981	47.6921
1982	48.26671
1983	48.53207
1984	48.53867
1985	48.46417
1986	48.38585
1987	48.25543
1988	48.15898
1989	48.12637
1990	48.1226
1991	48.10602
1992	47.976
1993	47.78844
1994	47.13013
1995	46.83416
1996	47.11906
1997	46.97317
1998	41.44438
1999	41.44896
2000	44.48251
2001	45.22557
2002	44.77291
2003	45.4629
2004	40.31483
2005	39.98876
2006	39.78308
2007	39.41321
2008	39.32876
2009	39.46989
2010	39.71192
2011	39.65321
2012	39.54261
2013	39.71705
2014	37.91754
2015	37.7349
2016	37.65361
2017	37.55295