The measures implemented early in the decade, coupled with significant improvements in the world economy, helped the South Korean economy regain its lost momentum in the late 1980s. South Korea achieved an average of 9.2 percent real growth between 1982 and 1987 and 12.5 percent between 1986 and 1988. The double-digit inflation of the 1970s was brought under control. Wholesale price inflation averaged 2.1 percent per year from 1980 through 1988; consumer prices increased by an average of 4.7 percent annually. Seoul achieved its first significant surplus in its balance of payments in 1986 and recorded a US$7.7 billion and a US$11.4 billion surplus in 1987 and 1988 respectively. This development permitted South Korea to begin reducing its level of foreign debt. The trade surplus for 1989, however, was only US$4.6 billion, and a small negative balance was projected for 1990.