Year	% of total teachers
2007	96.3453598022461
2009	96.3358917236328
2010	96.3479995727539
2011	97.0738372802734
2012	97.3564605712891
2013	98.3775177001953
2014	98.9853286743164
2015	97.2899322509766
2016	98.0061569213867
2017	98.1922836303711
2019	99.1116180419922
2020	97.9906234741211
2021	98.3170394897461
2022	97.7733612060547