Year	% of total teachers
2011	80.3359832763672
2012	82.0623397827148
2013	82.194221496582
2014	82.7675399780273
2015	82.4818267822266
2016	83.6934280395508
2017	83.7441101074219
2018	100
2019	100
2020	100
2022	100