|Commodity||Short tons||Percent of total|
|Coal, lignite, and coal coke||22,090,779||57.6|
|Iron ore, iron, and steel waste and scrap||5,689,174||14.8|
|Sand, gravel, shells, clay, salt, and slag||5,095,129||13.3|
|Food and food products||1,342,084||3.5|
|Primary metal products||468,433||1.2|
|Unknown and not elsewhere classified products2||2,961,382||7.7|
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.iwr.usace.army.mil/ as of Oct. 30, 2001.