Year	% female
1971	46.10059
1972	46.39723
1973	46.76752
1974	47.09706
1975	47.37616
1976	47.49969
1977	47.67046
1978	47.93211
1979	48.00464
1980	48.15222
1981	48.22837
1982	48.39092
1983	48.43928
1984	48.5401
1985	48.6754
1986	48.77034
1987	48.89224
1988	48.96192
1989	49.04141
1990	49.61516
1991	49.31987
1992	49.48033
1993	49.60241
1994	50.09316
1995	50.21208
1996	50.07138
1997	50.12008
1998	53.10101
1999	52.90817
2000	48.32768
2001	48.66526
2002	48.39956
2003	48.48619
2004	53.41994
2005	53.40506
2006	53.43875
2007	53.59994
2008	53.60948
2009	53.44556
2010	53.29877
2011	53.10978
2012	53.01909
2013	52.94499
2014	53.42845
2015	53.50544
2016	53.7104
2017	53.40505