Year	% of total teachers
2007	96.6386795043945
2009	96.6284713745117
2010	96.6422500610352
2011	97.4579620361328
2012	97.6386871337891
2013	97.9682693481445
2014	99.2450790405273
2015	98.1238021850586
2016	98.4936294555664
2017	98.69580078125
2019	99.2624435424805
2020	98.6725082397461
2021	99.2873611450195
2022	98.3844375610352