Year	% female
1970	44.45848
1971	44.76111
1972	44.73676
1973	45.55368
1974	46.28777
1975	47.16737
1976	47.97843
1977	48.74492
1978	49.49568
1979	49.60701
1980	49.60497
1981	49.50295
1982	49.74539
1983	49.72581
1984	49.67191
1985	49.60922
1986	49.68004
1987	49.70133
1988	49.63574
1989	49.6441
1990	49.66517
1991	49.81516
1992	49.76654
1993	49.69633
1994	49.62356
1995	49.82317
1996	49.73357
1997	49.84055
1998	50.00967
1999	49.87383
2000	49.58266
2001	49.55028
2002	49.3666
2003	49.42182
2004	49.76848
2005	49.64272
2006	49.51614
2007	49.62858
2008	49.5129
2009	49.64673
2010	49.57431
2011	49.5189
2012	49.54719
2013	49.58233
2014	49.70338
2015	49.71025
2016	49.55955
2017	49.53132
2018	49.52943