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As protectionist governments around the world have toppled, free trade zones opened up, and trade barriers dissolved through either multilateral agreements (such as the GATT) or through regional free trade agreements (such as NAFTA), greater numbers of enterprises have looked to foreign markets as sources of supply. International procurements, as a share of a firm's total purchase volume, have expanded steadily since the end of the 1970s. In 1977, only 2.5 percent of total purchased value in the U.S. was procured from other countries; the global proportion of purchases expanded to around 5 percent by 1981, and grew to 19 percent of total procurements in 1990.[1] This steady ...