Year	% of total teachers
2012	89.7486419677734
2013	91.0323181152344
2014	91.1386032104492
2015	91.2840118408203
2016	90.8015823364258
2017	91.3902435302734
2018	89.8769226074219
2019	88.8829498291016
2020	87.9483184814453
2021	87.106689453125
2022	84.7996215820312