Year	% of total teachers
2007	96.4469985961914
2009	96.4373168945312
2010	96.449951171875
2011	97.1904678344727
2012	97.4431228637695
2013	98.2514724731445
2014	99.0669708251953
2015	97.5270767211914
2016	98.1451873779297
2017	98.3408737182617
2019	99.1574172973633
2020	98.2218017578125
2021	97.4715728759766
2022	97.981559753418