Year	% female
1972	49.35384
1973	48.80781
1974	48.43411
1975	48.68397
1978	50.98369
1979	51.1892
1980	50.55406
1981	50.3654
1982	50.41199
1983	50.99666
1984	50.21487
1985	50.40304
1986	50.62509
1987	50.57881
1988	50.95697
1989	51.52316
1990	51.87458
1991	52.32646
1992	52.66799
1993	52.0961
1994	51.61615
1995	51.86723
1996	50.1244
1997	51.61236
1999	50.33406
2000	49.91613
2001	50.01016
2002	48.54523
2003	48.30675
2004	49.12285
2005	49.08783
2006	49.13028
2007	48.7392
2008	48.5751
2009	48.52086
2010	48.38102
2011	48.39934
2012	48.81856
2013	48.58332
2014	48.98353
2015	49.29587
2016	49.37618
2017	49.09229
2018	48.99787