International merchandise trade, by commodity, price and volume indexes, monthly

International merchandise trade price and volume indexes, grouped by North American Product Classification System (NAPCS) section. Users have the option of selecting Imports or Exports, as well as Paasche or Laspeyres price indexes, or Laspeyres volume indexes. Data are unadjusted and seasonally adjusted, on a Customs and Balance of Payments basis, at a monthly frequency.