Year	% of total teachers
2011	88.8066177368164
2012	88.7445373535156
2013	89.4145812988281
2014	90.7832183837891
2015	90.1914215087891
2016	90.5317077636719
2017	90.993293762207
2019	92.2679672241211
2020	94.0135192871094