Year	% female
1971	50.05574
1972	51.14029
1973	50.19763
1974	49.02454
1975	49.28349
1976	50.58318
1977	56.33089
1978	48.21933
1979	49.63949
1980	49.80695
1981	49.64108
1982	49.78284
1983	49.94541
1984	49.9726
1985	49.00332
1999	47.44526
2000	48.13052
2001	49.09677
2008	47.4313
2009	47.13337
2016	48.47619
2017	48.50814