Year	% female
1970	47.97424
1971	48.08478
1972	48.10912
1973	48.05812
1974	48.12275
1975	47.99302
1976	48.26655
1977	48.19406
1978	48.17079
1979	48.14445
1980	48.14797
1981	48.10657
1982	48.10566
1983	47.90839
1984	47.71322
1985	47.7875
1986	47.79812
1987	47.75306
1988	47.90326
1989	48.06168
1990	47.92733
1999	48.15841
2000	48.19159
2001	48.19363
2002	48.17172
2003	48.17184
2004	48.25597
2005	48.20064
2006	48.25916
2007	48.26234
2008	48.18212
2009	48.16954
2010	48.11164
2011	48.2629
2012	48.2351
2013	48.27937
2014	48.35305
2015	48.31232
2016	48.52663
2017	48.38463