Year	% of total teachers
2006	99.4015808105469
2007	99.9508819580078
2008	96.1766815185547
2009	94.2321166992188
2010	94.2297515869141
2011	97.9799118041992
2012	99.4157867431641
2013	98.4714736938477
2016	99.1223983764648
2017	98.2128295898438
2018	93.4396591186523
2019	89.7889175415039
2020	90.5021514892578
2021	90.2824630737305
2022	83.234001159668