Year	% of total teachers
2009	88.0942687988281
2010	88.6173400878906
2011	88.6828918457031
2012	88.6744003295898
2013	89.2081069946289
2014	90.0470428466797
2015	89.7184600830078
2016	89.7123870849609
2017	90.0644989013672
2018	89.9443511962891
2019	90.6510620117188
2020	82.3337936401367