Year	% female
1971	42.52611
1972	40.71347
1973	41.3462
1986	45.34192
1987	44.30915
1988	44.32873
1989	44.37131
1994	44.83361
1995	44.39194
1997	44.85184
1998	45.07603
1999	45.72122
2000	45.8456
2001	46.2729
2002	46.52233
2003	46.7828
2004	47.0335
2005	47.23994
2006	47.29639
2007	47.22081
2008	47.38734
2009	47.41394
2010	47.78671
2011	47.63875
2012	47.74581
2013	47.15295
2014	48.03557
2015	49.0537
2016	48.37189
2017	48.22462
2018	48.1383