Year	% female
1971	48.20025
1974	55.47432
1975	49.01728
1976	48.56261
1977	50.75147
1978	47.74092
1979	49.24139
1984	46.30507
1992	49.12884
2007	48.90656
2008	48.28749
2009	48.33274
2010	47.33428
2011	47.67388
2012	48.21582
2014	48.1223
2015	48.53627
2017	49.01468
2018	49.20478