Year	% female
1970	30.15072
1971	30.94081
1972	32.27115
1975	33.62324
1976	32.87466
1978	35.89724
1979	36.8749
1980	35.40987
1998	38.97761
1999	42.37951
2000	41.91934
2006	47.32556
2008	46.91778
2009	46.46716
2011	46.91313
2014	46.92687
2015	46.467
2016	48.92962
2017	48.85787