Year	% of government expenditure on education
1973	8.28257
1974	10.11158
1975	13.90938
1976	16.67284
1977	15.15731
1978	12.22315
1979	16.31356
1980	17.2673
1981	18.60683
1982	19.64937
1983	19.23627
1984	16.81664
1985	17.50032
1986	19.31538
1987	19.21848
1988	21.96687
1989	16.30905
1990	18.28877
1991	18.09689
1993	17.58079
1995	16.93068
1998	16.31298
1999	17.1396
2009	20.18324