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Figure 1
Hazardous Materials Shipments by Mode of Transportation: 1997
Excel | CSV
Value
Tons
Ton-miles3
1 Includes air, parcel, postal, courier, other, and unknown.
2 Excludes most shipments of crude oil.
3 Pipeline data are not published because of high sampling variability or other reasons.
NOTE:
Percentages may not add to 100 due to rounding
SOURCE:
U.S. Department of Commerce, Census Bureau, 1997 Economic
Census—1997 Commodity Flow Survey, Hazardous Materials (Washington, DC: December 1999), table 1.
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