Year	% of total teachers
2011	81.8796615600586
2012	82.8251419067383
2013	83.4751892089844
2014	83.7176132202148
2015	83.6524887084961
2016	85.1989822387695
2017	85.1673736572266
2018	100
2019	100
2020	100
2022	100