Year	% of total teachers
2012	96.7489776611328
2013	97.1546478271484
2014	96.4632720947266
2015	95.7610626220703
2016	95.6790084838867
2017	95.6449584960938
2018	95.7066421508789
2019	95.9552688598633
2020	94.2795181274414
2021	92.0466690063477
2022	89.1363677978516