Year	% of total teachers
2011	80.2393493652344
2012	82.1960830688477
2013	82.4135437011719
2014	82.7472305297852
2015	82.6648483276367
2016	84.2150421142578
2017	84.2774124145508
2018	100
2019	100
2020	100
2022	100