Year	% of total teachers
2012	90.4282913208008
2013	90.5031814575195
2014	90.8393630981445
2015	90.6435012817383
2016	89.5608978271484
2017	91.3081512451172
2018	89.6276626586914
2019	88.6556015014648
2020	87.0767669677734
2021	86.601806640625
2022	84.6306991577148