Year	% female
1970	42.21939
1971	42.36902
1972	40.5102
1973	39.11846
1974	38.61004
1975	42.25914
1976	41.27517
1977	41.74894
1978	41.46235
1980	41.96208
1981	40.44355
1983	37.63774
1991	42.94933
1999	45.15519
2000	51.75187
2001	46.16792
2002	46.98286
2003	44.03906
2004	44.699
2010	48.80529
2015	48.95955