strategy existed for the Northeast, it promoted a distorted industrialization that benefited only a few of that region's large cities; the Northeast's linkages with the Center-South were stronger than its linkages within the region. The combination of a harsh climate, a highly concentrated land-tenure system, and an elite that consistently resisted meaningful change prevented the Northeast from developing effectively. Growth with debt (1974–1980) Brazil suffered drastic reductions in its terms of trade as a result of the 1973 oil shock. In the early 1970s, the performance of the export sector was undermined by an overvalued currency. With the trade balance under pressure, the oil shock led to a sharply higher import bill. Brazil opted to continue a high-growth policy. Furthermore, it adopted renewed strategies of import substitution industrialization and of economic diversification. In the mid-1970s, the regime began implementing a development plan aimed at increasing self-sufficiency in many sectors and creating new comparative advantages. Its main components were to promote import substitution of basic industrial inputs (steel, aluminium, fertilizers, petrochemicals), to make large investments in the expansion of the economic infrastructure, and to promote exports. This strategy was effective in promoting growth, but it also raised Brazil's import requirements markedly, increasing the already large current-account deficit. The current account was financed by running up the foreign debt. The expectation was that the combined effects of import substitution industrialization and export expansion eventually would bring about growing trade surpluses, allowing the service and repayment of the foreign debt. Thus, despite the world recession resulting from other countries' adjustments to the oil shock, Brazil was able to maintain a high growth rate. Between 1974 and 1980, the average annual rate of growth of real GDP reached 6.9 percent and that of industry, 7.2 percent. However, the current-account deficit increased from US$1.7 billion in 1973 to US$12.8 billion in 1980. The foreign debt rose from US$6.4 billion in 1963 to nearly US$54 billion in 1980. Brazil was able to raise its foreign debt because, at the time, the international financial system was awash in petrodollars and was eagerly offering low-interest loans. By the end of the 1970s, however, the foreign debt had reached high levels. Additionally, the marked increase of international interest rates raised the debt service, forcing the country to borrow more only to meet interest payments. Productive capacity, exports, and the substitution of imports in various sectors expanded and became more