Year	% of total teachers
1999	31.1247692108154
2010	76.7028274536133
2011	70.7967071533203
2012	82.1386108398438
2013	76.0669097900391
2015	73.3292007446289
2019	76.7095031738281
2020	75.7178802490234
2021	75.7940826416016
2022	78.5398178100586