Year % of government expenditure on education 1980 9.04242 1991 18.06756 1993 18.78736 1994 19.01944 1998 16.43377 1999 15.92241 2000 17.5713 2001 17.10481 2002 17.53864 2004 21.77871 2005 22.06052 2006 22.89283 2007 25.11732