Annual growth rates of export value are calculated from current U.S. dollar price series. Annual growth rates of import value are calculated from current U.S. dollar price series. Merchandise export price index measures changes in the aggregate price level of a country's merchandise exports f.o.b. over time. Merchandise import price index measures changes in the aggregate price level of a country's merchandise imports c.i.f. over time. Merchandise exports show the f.o.b. value of goods provided to the rest of the world valued in U.S. dollars.
Data are in current U.S. dollars.
Merchandise imports show the c.i.f. value of goods received from the rest of the world valued in U.S. dollars. Group totals for merchandise imports are calculated by simple aggregation after estimating values for countries for which data are missing. Missing values are imputed for a group only when data are available for countries with at least 66 percent weight in 1987 for that group. Data are in current U.S. dollars. Machinery and transport equipment comprise the commodities in SITC section 7.