|Commodity||Short tons||Percent of total|
|Coal, lignite, and coal coke||2,947,665||37.4|
|Sand, gravel, shells, clay, salt, and slag||1,329,475||16.9|
|Primary nonmetal products||1,271,747||16.1|
|Primary metal products||130,469||1.7|
|Food and food products||29,018||0.4|
|Chemicals excluding fertilizers||21,122||0.3|
|Unknown and not elsewhere classified products2||2,042,367||25.9|
1 "Domestic" includes intrastate shipments.
2 To protect confidentiality if three or more vessel operating companies do not carry a particular commodity from a state of origin to a state of destination, then that commodity is reclassified to "unknown and not elsewhere classified products."
SOURCE FOR DATA ON THIS PAGE: U.S. Army Corps of Engineers, Waterborne Commerce Statistics Center, State to State and Region to Region Commodity Tonnages, Public Domain database, available at http://www.wrsc.usace.army.mil/ndc/datapdom.htm as of Oct. 30, 2001.