After the 1984 baht devaluation and the 1985 Plaza Accord, although the public sector struggled due to fiscal constraints, the private sector grew. The country's improved foreign trade and an influx of foreign direct investment (mainly from Japan) triggered an economic boom from 1987 to 1996. Although Thailand had previously promoted its exports, during this period the country shifted from import-substitution (ISI) to export-oriented industrialization (EOI). During this decade the Thai GDP (calculated from the IMF World Economic Outlook database) had an average growth rate of 9.5 percent per year, with a peak of 13.3 percent in 1988. In the same period, the volume of Thai exports of goods and services had an average growth rate of 14.8 percent, with a peak of 26.1 percent in 1988.