Year	% of total teachers
2012	96.2948989868164
2013	95.2812881469727
2014	94.9973602294922
2015	94.4665603637695
2016	94.5377807617188
2017	94.560173034668
2018	94.8115081787109
2019	95.0131072998047
2020	93.6284103393555
2021	91.6725921630859
2022	89.1370468139648