Year	% of total teachers
2012	99.1347579956055
2013	99.1953125
2014	99.2515487670898
2015	99.2755813598633
2016	99.1442718505859
2017	99.2771224975586
2018	99.0693817138672
2019	98.9342727661133
2020	98.9647674560547
2021	98.9086608886719
2022	94.0840530395508