Year	% of total teachers
2006	80.5584487915039
2007	81.4728622436523
2008	81.0224533081055
2009	80.7899169921875
2010	80.720100402832
2011	80.7953033447266
2012	80.9301681518555
2013	77.8166885375977
2014	78.1710662841797
2015	78.8016662597656
2016	79.1646270751953
2017	79.2940902709961
2018	78.9719619750977
2019	79.5465621948242
2020	80.1395111083984
2021	80.5664978027344
2022	80.2079772949219