Year	% female
1970	25.4867305755615
1971	28.4470195770264
1972	25.944580078125
1973	28.554500579834
1974	30.3841705322266
1975	36.7007713317871
1976	29.774730682373
1977	32.3004684448242
1978	31.2829494476318
1979	33.3855781555176
1980	33.8995018005371
1981	34.915470123291
1984	30.7606906890869
1991	44.7513809204102
1992	45.907470703125
1993	45.1005592346191
1994	43.3485298156738
1995	44.0936088562012
1996	47.0111389160156
1998	47.4813117980957
1999	47.7760009765625
2000	50
2001	51.4658012390137
2002	52.6788291931152
2003	54.8472785949707
2004	55.8375587463379
2005	58.0919494628906
2006	59.2009391784668
2007	59.9906387329102
2008	61.410228729248
2009	63.2036514282227
2011	65.2996215820312
2012	65.7935333251953
2013	66.7609405517578
2014	66.7850036621094
2015	67.8889999389648
2016	67.6869964599609
2017	68.6139984130859
2018	68.7379989624023
2019	69.1880035400391
2020	68.0276794433594