Year	% of total teachers
2000	90.404182434082
2001	92.5541915893555
2002	93.0053176879883
2003	93.7728424072266
2004	88.4983901977539
2005	94.3966903686523
2006	95.4148635864258
2007	95.1085510253906
2008	95.8236770629883
2009	96.0808868408203
2010	96.5634078979492
2011	95.9717102050781
2012	94.569580078125
2013	95.2302017211914
2014	94.6534194946289
2015	94.2494430541992
2016	94.2391662597656
2017	94.0121612548828
2018	93.9194793701172
2019	93.2178802490234
2020	93.5859985351562
2021	90.7275390625