The Ton-Miles of Freight Shipments table shows that in 2002:
Mixed freight was the commodity that grew fastest as measured by percent change in ton-miles, increasing from 14 billion tons in 1993 to 58 billion tons in 2002—a 17 percent annual rate. Miscellaneous manufactured products and pharmaceuticals was the next fastest, growing about 13 percent annually.
Ranked by value-per-ton, pharmaceutical products ranked highest, averaging nearly $19,000 per ton, followed by electronic, electrical, and office equipment, averaging about $18,000 per ton. Among all commodity groups, gravel and crushed stones ranked lowest in value-per-ton, at $7 per ton.