Year	% of total teachers
2000	88.1775512695312
2001	90.4190521240234
2002	92.5894317626953
2003	94.7362518310547
2004	90.4643020629883
2005	95.262077331543
2006	96.083869934082
2007	95.808349609375
2008	96.4103469848633
2009	96.5558624267578
2010	96.885383605957
2011	96.3798599243164
2012	95.2176971435547
2013	95.7660827636719
2014	95.2684783935547
2015	94.948127746582
2016	94.9551086425781
2017	94.7190322875977
2018	94.8884887695312
2019	94.1765823364258
2020	93.9807205200195