Year	% of total teachers
1998	91.8311309814453
1999	90.2426834106445
2000	89.1553421020508
2001	89.4826202392578
2002	89.0750885009766
2003	89.7223510742188
2004	92.4746398925781
2005	92.5877075195312
2006	94.2898864746094
2007	97.3900985717773
2008	98.8501281738281
2009	100
2012	99.5328369140625
2013	98.6365127563477