Year	% female
1970	42.86977
1971	42.96005
1972	43.2609
1973	43.34732
1974	43.13304
1975	42.4319
1976	43.7571
1977	43.42093
1978	43.77075
1979	45.06098
1980	44.78597
1981	45.10482
1982	45.38285
1983	45.75825
1984	45.53431
1985	44.18516
1986	44.17986
1987	45.19341
1988	45.10727
1989	45.25254
1990	43.9625
1991	43.58395
1992	43.03906
1993	42.90377
1994	44.69021
1995	44.96271
1996	45.30612
1997	44.56349
1998	45.1114
1999	45.39036
2000	45.20952
2001	45.09627
2002	44.62603
2003	44.80271
2004	45.15608
2005	46.15049
2006	46.56608
2007	46.67982
2008	46.66773
2009	46.66268
2010	44.28358
2011	44.02325
2012	43.90524
2013	43.61662
2014	43.65253
2015	43.97814
2016	43.78524
2017	42.99078
2018	42.6422