Year	% of total teachers
2004	90.7239990234375
2005	91.2013397216797
2006	91.3444366455078
2007	92.0218505859375
2008	92.4380416870117
2009	90.6829681396484
2010	92.8117904663086
2011	78.8209915161133
2012	93.525749206543