Year	% female
1971	41.52187
1972	45.18674
1977	46.22617
1988	47.34966
2003	53.47253
2004	50.49171
2005	51.13089
2007	51.21707
2008	51.13876
2009	52.2517
2010	50.05447
2011	52.92831
2012	52.61361
2013	52.0536
2014	51.90344
2015	52.15839
2016	52.78065
2017	53.13623