Year	% female
1972	52.55699
1973	50.11862
1974	50.98344
1975	50.81708
1976	49.04294
1977	50.53715
1978	50.30938
1979	51.01751
1980	50.40303
1981	49.2228
1999	46.82761
2000	49.95633
2001	49.0279
2002	49.37133
2004	48.52722
2005	48.39506
2006	48.0497
2007	48.2191
2008	47.85867
2011	50.31368
2012	50.03719
2013	49.6962
2018	48.38334