Year	% of total teachers
1999	75.7153930664062
2000	76.6925201416016
2001	76.2407379150391
2002	76.1499404907227
2003	77.5226593017578
2004	79.3534622192383
2005	83.3810424804688
2006	85.7590179443359
2007	89.6703109741211
2008	96.8856811523438
2009	91.9874267578125
2010	95.4030609130859
2011	93.765998840332
2012	97.2379989624023
2013	97.9800033569336
2014	98.2809982299805
2015	98.4260025024414
2016	97.4960021972656
2017	97.0169982910156
2018	97.0169982910156
2019	96.9100036621094
2020	98.8430023193359
2021	99.0999984741211
2022	89.7330017089844