Year	% of total teachers
1999	30.5851097106934
2000	30.9248600006104
2001	31.5508003234863
2002	37.9232482910156
2003	29.7826099395752
2004	35.9550590515137
2005	31.25
2006	34.2857093811035
2007	40.5117301940918
2008	31.0276699066162
2009	36.4503784179688
2010	38.7475509643555
2011	40.9345817565918
2012	41.0709991455078
2013	41.0681381225586
2014	46.3178291320801
2015	45.3846206665039
2016	48.561149597168
2019	44.9596786499023
2021	47.4332618713379
2022	42.6294784545898