Year	% female
1971	43.56147
1972	48.2934
1973	48.41081
1974	49.22599
1975	49.63119
1976	49.45761
1977	49.56165
1978	49.33347
1979	48.15193
1980	47.82961
1981	46.81676
1982	47.06455
1983	47.06496
1984	49.21807
1985	50.40881
1986	51.4964
1987	51.73227
1988	52.24388
1989	53.1781
1990	53.90232
1991	53.78881
1992	53.92483
1993	53.66578
1994	53.45129
1995	53.30378
1996	53.52452
1997	53.59841
1998	53.51372
1999	53.74744
2000	53.18472
2001	53.34553
2002	53.2967
2003	52.94602
2004	53.09891
2005	53.15077
2006	52.38957
2008	52.08583
2009	52.60382
2010	52.81993
2011	52.10443
2012	51.9386
2013	51.68262
2014	52.13494
2015	51.87439
2016	51.7704
2017	51.82577
2018	51.68301