Year	% female
1971	54.03226
1972	50.64461
1973	53.23271
1974	53.16149
1975	53.19149
1976	52.17662
1977	52.03041
1978	51.79351
1979	50.54166
1980	50.36296
1981	49.80446
1982	49.48967
1983	49.37769
1984	49.51502
1985	50.4324
1995	50.18294
1997	50.72464
2001	51.11695
2002	51.47864
2003	52.44635
2004	53.071
2005	52.43902
2006	51.46082
2010	53.41784
2011	53.28704
2012	53.0303
2013	53.07784
2014	52.47984
2015	51.95545