High Quality Content by WIKIPEDIA articles! 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, and substantial borrowing from the West to supplement hard-currency export earnings.