Year	% of total teachers
2009	96.7505493164062
2010	97.0348510742188
2011	96.823356628418
2012	96.4521179199219
2013	96.4972763061523
2014	96.2640686035156
2015	96.1953506469727
2016	96.0981903076172
2017	95.7972564697266
2018	96.3976669311523
2019	95.567253112793
2020	93.8065185546875