|Electrical machinery, equipment, and parts||2.3|
|Salt, stone, and cement||3.2|
|*Nuclear reactors, machinery, and parts||4.1|
|Plastics and articles thereof||4.2|
|Iron and steel||4.7|
|Paper and paperboard||4.7|
|Wood and articles||4.7|
|Motor vehicles and parts||7.1|
|Mineral fuels, oils, and waxes||28.8|
NOTES: These data reflect U.S. import and export trade with Canada and Mexico. Weights of export shipments by land modes are estimates from the Bureau of Transportation Statistics.
*"Nuclear reactors and parts" is a very small portion of trade under this commodity grouping (HS 84). The majority of trade for this commodity is computer-related machinery and parts.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, Transborder Freight Data, as of May 2005.