Year	% female
1970	43.4549
1971	43.0215
1972	43.91879
1973	44.44044
1974	44.65919
1975	45.38085
1976	46.15714
1977	45.54056
1978	46.01955
1979	45.80572
1980	46.1643
1983	49.29474
1984	50.04694
1988	51.77779
1989	50.6139
1991	51.60921
1992	50.7458
1993	50.75258
1995	51.27701
1998	48.77958
2000	48.45046
2001	48.88348
2002	48.85382
2003	49.26272
2004	49.2599
2005	49.30645
2006	49.6031
2007	49.61561
2008	49.41057
2009	49.14246
2010	49.05512
2011	48.94872
2012	48.86191
2013	49.13806
2014	49.41243
2015	49.44677
2016	49.22952
2017	49.15681
2018	49.30743