Year	% of total teachers
2000	54.7169799804688
2001	40.8888893127441
2003	40.9396018981934
2004	43.0769195556641
2006	34.1414108276367
2007	32.688591003418
2008	30.3326797485352
2009	29.708740234375
2010	34.442268371582
2012	30.9401702880859
2013	28.4991607666016
2015	39.6103897094727
2016	44.0570487976074
2018	58.3072090148926
2019	64.8985977172852
2020	69.4785308837891
2021	70.4845809936523
2022	70.6060562133789