Year	% female
1970	50.19518
1971	51.04522
1972	52.76143
1973	52.94268
1974	52.95407
1975	49.05551
1976	53.1218
1977	52.72055
1978	53.60003
1979	54.3299
1980	54.30312
1981	54.86354
1982	54.44649
1983	54.97956
1984	54.33036
1985	53.7448
1986	54.10432
1987	53.82792
1988	53.78742
1989	53.85772
1990	54.25787
1991	54.74611
1992	53.61726
1993	54.03969
1994	54.28899
1995	54.10231
1996	53.93726
1997	54.05597
1998	53.96337
1999	54.40345
2000	53.36982
2001	53.01789
2002	53.10548
2003	56.11029
2004	52.34331
2005	52.38387
2006	52.90317
2007	53.51945
2008	53.54643
2009	53.78066
2010	53.79197
2011	53.70511
2012	53.61238
2013	52.17672
2014	52.08333
2015	52.37497
2016	52.52238
2017	52.09395
2018	52.10803