Despite the uneven balance of trade, the Thai economy continued to grow by an average of 6.8 percent in the 1970s, 7.5 percent in the 1980s, and 8 percent in the early 1990s before the Asian financial crisis. This growth can be attributed to 2 factors, namely the boom of the tourism industry and the inflow of foreign direct investment. According to International Historical Statistics, in 1970, the services sector contributed 44.1 percent of GDP, which increased in 1980 to 49.7 percent. Though this contribution fell to 46.9 percent in 1999, it is safe to say that the dollar earnings from the tourism industry generated a substantial amount, enough to offset the trade imbalance.
Foreign direct investment (FDI) is another major factor in the growth of the economy since the mid-1980s. In 1988, FDI infused US$1.25 billion into the economy, partly explaining the 7.5 percent growth despite a US$4.332 billion discrepancy in balance of trade in favor of imports. Foreign direct investment doubled to US$2.5 billion in 1990.
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