Year	% of total teachers
2002	31.578950881958
2003	32.4561386108398
2007	42.2764205932617
2008	46.2745094299316
2009	38.3285293579102
2010	45.1219482421875
2013	40.3703689575195
2014	51.5050201416016
2015	35.2941207885742
2016	40.0662307739258
2017	37.4581909179688
2018	38.461540222168
2022	50.8532409667969