Year	% female
1970	55.98635
1971	54.85726
1972	54.19128
1973	53.38242
1974	53.19571
1975	53.87407
1976	53.95847
1977	53.55406
1978	53.15452
1979	54.37595
1980	54.66562
1981	53.71069
1982	53.8497
1983	54.45968
1984	54.44492
1985	53.8649
1986	54.57551
1987	53.79614
1988	53.33084
1989	52.89316
1990	51.19403
1999	51.27924
2000	49.10479
2001	51.13769
2002	49.30237
2004	49.68495
2005	48.92866
2006	49.60022
2007	47.78209
2008	48.52601
2009	48.17028
2010	48.72029
2011	49.324
2012	48.20458
2016	46.34115
2017	47.0542