Year	% of total teachers
2012	96.4344863891602
2013	96.7633590698242
2014	96.4269332885742
2015	95.9322509765625
2016	95.8188095092773
2017	95.7863082885742
2018	95.9104766845703
2019	96.0503692626953
2020	94.3845672607422
2021	92.2129669189453
2022	89.2491683959961