Year	% female
1971	40.17952
1972	40.44085
1973	39.29095
1974	39.7557
1975	39.28855
1976	39.56583
1977	39.82718
1978	39.87095
1980	40.39225
1981	41.77791
1982	40.80957
1983	40.95185
1984	40.99991
1985	40.9998
1988	40.97084
1989	41.9559
1990	40.92987
1991	41.24912
2000	48.37926
2001	41.56245
2011	48.79845
2012	49.82772
2013	50.08755
2015	50.3796
2016	50.28913
2017	50.48385
2018	50.85221