Year	% of total teachers
2012	89.9558181762695
2013	90.3547592163086
2014	90.7133407592773
2015	90.6646728515625
2016	90.2343368530273
2017	90.7997512817383
2018	89.5868225097656
2019	88.3452911376953
2020	86.8555374145508
2021	86.3397827148438
2022	84.391227722168