Year	% of government expenditure on education
1972	31.81006
1973	34.75576
1975	36.38795
1976	26.16033
1977	28.8782
1978	29.49915
1979	30.40076
1980	35.01039
1981	33.00283
1982	33.81902
1984	25.27619
1985	26.6251
1986	27.07731
1987	29.91331
1988	27.30503
1989	28.62229
1996	31.29448
2002	33.41477
2007	35.85406
2009	36.90446