Year	% of total teachers
1999	100
2000	100
2001	100
2004	99.5815887451172
2005	99.636360168457
2006	99.6835403442383
2008	98.3379516601562
2011	99.7245178222656
2012	99.0415267944336
2018	100
2019	100
2020	99.9710235595703
2021	100
2022	100