Year	% of total teachers
1998	79.0697708129883
2010	94.5139999389648
2011	97.8199996948242
2012	97.8430023193359
2013	98.4130020141602
2014	87.6949996948242
2015	93.9860000610352
2016	95.5250015258789
2017	96.8440017700195
2018	98.9720001220703
2019	91.2634429931641