Year	% female
1971	48.82075
1972	31.53527
1973	52.21843
1979	33.15217
1980	37.88546
1981	36.08139
1982	34.27732
1983	32.47325
1984	30.66918
1985	28.86511
1986	27.06104
1987	25.25698
1988	23.45291
1989	21.64884
1990	19.84477
1991	18.0407
1992	16.23663
1993	14.43256
1994	12.62849
1995	10.82442
1996	9.02035
1997	7.21628
1998	2.88419
1999	5.74633
2000	8.62072
2001	11.49822
2002	14.37277
2003	17.24733
2004	20.12188
2005	22.99644
2006	25.87099
2007	28.74555
2008	31.6201
2009	34.49466
2010	37.36921
2011	40.24376
2012	43.11832
2013	43.7466
2014	44.1217
2015	43.45464
2016	45.05835
2017	45.85005
2018	45.85005