Year	% female
1970	45.89486
1971	44.23137
1972	43.12112
1973	42.62632
1974	43.7463
1975	44.24757
1976	45.32278
1977	45.76924
1978	45.82357
1979	47.20893
1980	47.29053
1981	48.36319
1982	45.50362
1983	48.39776
1984	49.32166
1985	49.64282
1986	49.94097
1988	48.1503
1989	47.92897
1990	47.73881
1991	47.73102
1992	47.19904
1993	47.45024
1994	46.55444
1998	47.47933
1999	47.3612
2000	46.9912
2002	46.93053
2003	45.96104
2004	46.02646
2005	46.19172
2006	46.75661
2007	47.01495
2008	47.31282
2009	47.63586
2010	47.37931
2011	47.46411
2012	47.17495
2013	46.77213
2014	46.56807
2015	46.31531
2016	46.19255
2017	45.93058