Year	% of total teachers
2002	83.5186462402344
2003	75.1578903198242
2004	60.0653190612793
2005	58.9900207519531
2006	60.3354415893555
2007	67.5614395141602
2008	69.3581237792969
2009	67.2199401855469
2010	65.9081726074219
2011	62.9357490539551
2012	73.4748001098633
2013	63.9019012451172
2014	64.858757019043
2015	66.6258163452148
2016	67.0037689208984
2017	66.7553024291992
2018	66.7042388916016
2019	69.1110000610352
2020	71.6461486816406
2021	68.6515579223633
2022	67.5595016479492