Year	% of total teachers
2012	89.9930191040039
2013	92.5028686523438
2014	92.719482421875
2015	92.5795135498047
2016	92.4389877319336
2017	91.5591583251953
2018	90.4723892211914
2019	89.1853637695312
2020	87.6221694946289
2021	86.3481903076172
2022	83.8303985595703