Year	% female
1971	30.01129
1972	28.69019
1973	32.07915
1974	33.61426
1975	40.03616
1976	41.78422
1977	42.13314
1978	44.92285
1979	45.08847
1980	45.23091
1982	43.61214
1983	45.28702
1984	45.24228
1985	44.85096
1986	44.55155
1987	45.09858
1988	45.37969
1991	45.93016
1992	44.38098
1993	42.14944
1994	43.30026
1995	43.3056
1996	42.85179
1997	41.94467
1998	41.56706
1999	43.0334
2000	43.3292
2001	43.47345
2002	43.96902
2003	44.07916
2004	44.10598
2005	44.32674
2006	44.05793
2007	43.45454
2008	43.12918
2009	43.07362
2010	42.55204
2011	41.94494
2012	41.89436
2013	41.53922
2014	41.56279
2015	41.89368
2016	42.1248
2017	42.70973