Year	% of total teachers
2012	99.9387435913086
2013	99.9474487304688
2014	99.9403762817383
2015	99.8490371704102
2016	99.8240509033203
2017	99.7421035766602
2018	99.7133102416992
2019	99.7312088012695
2020	99.6607666015625
2021	99.5756072998047
2022	99.5524368286133