Year	% of total teachers
2004	87.5212783813477
2005	88.148307800293
2006	81.2895812988281
2007	88.6677780151367
2008	86.3750305175781
2009	89.2966690063477
2010	89.8130187988281
2011	90.1875686645508
2012	90.6465530395508