Year	% of total teachers
2011	88.5522003173828
2012	88.6005935668945
2013	88.9951782226562
2014	89.3210067749023
2015	89.2530212402344
2016	88.9163665771484
2017	89.1705169677734
2019	89.0904083251953
2020	72.9573974609375