Year	% female
1972	49.87793
1987	45.79736
1988	48.07422
1989	48.83181
1990	50.38139
1994	48.80471
2001	51.40341
2002	50.94371
2003	51.96882
2004	52.17915
2005	52.4634
2006	53.49874
2007	54.1714
2008	52.42949
2009	54.12957
2010	54.20011
2011	53.87484
2012	53.92859
2013	53.14381
2014	52.70548
2015	52.22395
2016	52.04053
2017	52.02678
2018	52.22378