Year	% of total teachers
2012	98.5096206665039
2013	98.8250885009766
2014	98.8579635620117
2015	98.83544921875
2016	98.7168579101562
2017	98.8074035644531
2018	98.5406036376953
2019	98.3220672607422
2020	98.1793823242188
2021	98.0217437744141
2022	92.9393615722656