Year	% of total teachers
1999	60.7299308776855
2000	58.0851211547852
2001	56.8028602600098
2002	55.7191009521484
2003	53.5606002807617
2004	50.1481018066406
2005	51.719841003418
2006	48.5651817321777
2007	50.8751106262207
2008	48.2521705627441
2009	45.5404014587402
2010	45.6172485351562
2011	44.6690483093262
2012	47.5718688964844
2013	47.4838981628418
2014	47.7686309814453
2015	50.5274200439453
2016	50.9385681152344
2017	51.7490997314453
2018	54.9831314086914
2019	58.1777114868164
2020	60.5256614685059
2021	59.6404685974121
2022	61.028450012207