Year	% of total teachers
1998	84.9000015258789
1999	86.3897323608398
2000	87.5492324829102
2001	89.3990097045898
2002	90.6256332397461
2003	91.1424713134766
2004	91.8492126464844
2005	93.1641693115234
2006	94.8320693969727
2007	94.5602416992188
2008	95.1198806762695
2009	95.124153137207
2010	95.6056365966797
2011	95.7912902832031
2012	95.7918472290039
2013	96.0071563720703
2014	96.4113311767578
2015	96.1748580932617
2016	96.6066284179688
2017	96.8944091796875
2018	96.5510864257812
2019	95.982048034668
2020	95.6809463500977
2021	96.1494064331055
2022	95.6746826171875