The evidence shows that in the two decades a major composition of imports fell into
a few categories, notably raw materials (including petroleum), capital goods and chemical
goods. It is plausible to conclude that import dependence has not been reduced and
industrialization through import-substitution has not yet deepened the manufacturing sector
(Jansen, 1989; Santikarn Kaosa-ard, 1992; UNIDO, 1992).