Year	% female
1971	42.10798
1972	45.02088
1973	45.12848
1974	45.43647
1975	45.4798
1976	45.69755
1977	46.33871
1978	46.15771
1979	46.60973
1980	47.33015
1981	47.82358
1982	48.2962
1983	48.60664
1984	48.69158
1985	48.58864
1986	48.6631
1987	48.58769
1988	48.8175
1989	48.91839
1990	48.92224
1991	47.93753
1992	48.92229
1993	49.36712
1994	49.34209
1995	50.23769
1996	48.92591
1997	48.92313
1998	48.91643
1999	48.77265
2000	48.94494
2001	48.86755
2002	48.59594
2003	48.97635
2004	48.95211
2005	48.47357
2006	48.75162
2007	48.65297
2008	48.82747
2009	48.90466
2010	48.84271
2011	48.8864
2012	49.06331
2013	49.13494
2014	48.91898
2015	48.99862
2016	48.96106
2017	48.10158
2018	48.97198