Year	% female
1970	41.41877
1971	41.07733
1972	41.31778
1973	39.91259
1974	39.4798
1975	39.60575
1976	38.76652
1977	38.32174
1978	37.92086
1979	37.68004
1980	36.48863
1981	36.22943
1982	38.5342
1983	35.5172
1984	31.38612
1985	34.73613
1986	38.19437
1987	40.89973
1988	42.20818
1989	43.34049
1990	43.16011
1991	42.19153
1992	41.42557
1993	40.95453
1994	41.01122
1995	39.6537
1996	39.24472
1997	39.22073
1998	39.16363
1999	39.23793
2000	38.57239
2001	38.499
2002	37.75962
2003	37.88628
2004	38.89894
2005	41.32709
2006	42.08639
2007	42.07716
2008	42.11339
2009	43.12506
2010	43.49358
2011	43.90909
2012	44.73283
2013	44.73093
2014	45.23113
2015	44.17532
2016	44.00964
2017	43.56973
2018	42.12489