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U.S. Hazardous Materials Shipments by Hazard Class, 2007
Numbers may not add to totals due to rounding.
KEY: U = data are not available or less than 1 unit of measure or rounds to zero; S = data were not published because of high sampling variability or other reasons.
U.S. Department of Transportation, Bureau of Transportation Statistics, and U.S. Department of Commerce, Census Bureau, 2012 Commodity Flow Survey, American Fact Finder, Hazardous Materials (Washington, DC: December 2014), table CF3333H02, available at as of Dec. 9, 2014.