Year	% of total teachers
1998	100
1999	100
2000	100
2001	100
2002	100
2003	100
2004	100
2005	100
2006	100
2007	100
2008	100
2009	100
2010	89.8539962768555
2011	93.0120010375977
2012	93.6009979248047
2016	100
2017	99.9589996337891
2018	96.9010009765625
2019	95.6900024414062
2022	97.9820022583008