Year	% female
1971	48.95913
1972	49.03964
1973	48.99216
1974	44.39332
1975	47.06193
1976	49.95134
1977	49.94263
1978	49.85433
1979	49.65833
1980	49.65334
1981	49.75439
1982	49.04322
1983	48.27438
1984	49.59071
1985	48.42346
1989	49.35438
1990	49.03914
1992	49.37364
1999	48.92707
2000	48.89888
2001	49.12281
2002	49.22202
2003	48.9382
2004	48.90043
2005	49.2112
2006	48.69774
2007	49.26054
2008	49.02184
2009	49.04739
2010	49.15045
2011	48.64721
2014	48.87818
2015	48.74934
2016	49.01355
2017	48.29278
2018	48.32328