Year	% of total teachers
2012	83.5403900146484
2013	82.017822265625
2014	83.851188659668
2015	83.3249435424805
2016	81.7891616821289
2017	85.2005996704102
2018	87.2095718383789
2019	87.1888580322266
2020	85.7006607055664
2021	86.8125610351562
2022	89.1729278564453