Year	% female
1971	32.13018
1973	28.00464
1974	26.02682
1975	26.48586
1976	26.55997
1977	31.7311
1983	38.27977
1986	37.28223
1988	38.24816
1989	37.96332
1991	34.22967
1992	33.65755
1993	33.77664
1994	34.83497
1995	34.08428
1996	34.85724
1998	32.86767
1999	34.38422
2000	35.88808
2001	37.65562
2002	40.26463
2003	38.27415
2004	41.35616
2005	39.91161
2006	40.95368
2007	42.6082
2008	42.40419
2009	41.62409
2010	41.71249
2011	41.97142
2012	40.50013
2013	42.55956
2014	41.4237
2015	40.75433
2016	38.73041
2017	36.19976