Year	% of total teachers
1999	98.0861206054688
2000	97.8902969360352
2001	99.1453018188477
2002	99.1666717529297
2004	99.6015930175781
2005	98.8142318725586
2006	97.2027969360352
2007	95.8208999633789
2008	95.7928771972656
2011	94.8484802246094
2012	97.0297012329102
2013	88.1188125610352
2018	100
2019	100
2020	100
2021	100
2022	96.5811996459961