Year	% of total teachers
2008	100
2009	100
2010	95.746467590332
2011	96.3729476928711
2012	97.5891571044922
2013	97.2428588867188
2014	97.3969192504883
2015	97.979606628418
2016	98.1926574707031
2017	98.3801116943359
2018	98.9513320922852
2020	99.2459869384766
2021	99.7632217407227