NOTE: These data reflect U.S. import and export trade with Canada and Mexico. Commodity code is the Harmonized Schedule (HS) for internationally traded commodities.
* "Nuclear reactors" is a very small portion of trade under this commodity grouping (HS 84). The majority of trade for this category is computer-related machinery and parts.
**"Special classification provisions" is primarily made up of U.S. goods exported and returned without having been improved in value or condition for imports and an estimate of low value shipments for exports.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Transborder Freight Data, as of April 2006