Year	% female
1971	16.57208
1972	15.49498
1973	14.84805
1974	15.28462
1975	16.09985
1976	16.93724
1977	17.59565
1978	19.37889
1979	19.53515
1980	23.94334
1981	24.86427
1982	25.6017
1983	25.33027
1984	24.02089
1985	25.51849
1986	26.23066
1987	28.21574
1988	27.08023
1989	28.47685
1990	27.73651
1991	28.68061
1992	29.03959
2001	34.31465
2002	34.29473
2003	34.26878
2005	37.57766
2006	38.35903
2008	36.63067
2009	36.10706
2011	35.78268
2012	34.1742
2016	39.08529
2017	40.052