Year	% of total teachers
2012	90.2091674804688
2013	91.5304336547852
2014	91.8002166748047
2015	91.6344528198242
2016	91.030891418457
2017	91.4360427856445
2018	90.0585632324219
2019	88.923957824707
2020	87.3498229980469
2021	86.4753875732422
2022	84.2326431274414