Year	% of total teachers
2010	77.3730010986328
2011	21.6022891998291
2012	74.4359970092773
2013	69.7330017089844
2015	69.818000793457
2016	52.1220016479492
2017	34.4756011962891
2018	41.8907585144043
2019	42.6242485046387
2020	48.2454681396484
2021	29.0322608947754
2022	27.2766990661621