Year	% of total teachers
1999	53.2051315307617
2000	56.0975608825684
2002	59.7633094787598
2011	83.561637878418
2012	92.5170135498047
2013	72.1804504394531
2014	71.4285736083984
2015	83.0985870361328
2016	75.7763977050781
2017	82.1596221923828
2018	63.218391418457
2019	77.5510177612305
2021	87.4396133422852