Soviet foreign trade played only a minor role in the Soviet economy. In 1985, for example, exports and imports each accounted for only 4 percent of the Soviet gross national product. The Soviet Union maintained this low level because it could draw upon a large energy and raw material base, and because it historically had pursued a policy of self-sufficiency. Other foreign economic activity included economic aid programs, which primarily benefited the less developed Council for Mutual Economic Assistance (COMECON) countries of Cuba, Mongolia, and Vietnam.