Year	% of total teachers
2012	97.9027786254883
2013	98.4584274291992
2014	98.4703216552734
2015	98.4057083129883
2016	98.296501159668
2017	98.3423004150391
2018	98.0249328613281
2019	97.7230834960938
2020	97.4018020629883
2021	97.1356582641602
2022	91.8023071289062