Estimates are based on data from the 2007 and 2002 Commodity Flow Surveys. Because of rounding, estimates may not be additive.
|SCTG Code 1||Commodity Description||Value (percent)||Tons (percent)||Ton-miles (percent) 2||Value Standard Error of %||Tons Standard Error of %||Ton-miles Standard Error of %|
|17||Gasoline and aviation turbine fuel||45.8||42.3||43||48.5||21.2||35.9||1.4||1.5||1.3||1.9||1.7||2.7|
|19||Coal and petroleum products, n.e.c.||9.2||6.3||11.1||9.1||18.4||12.5||0.7||0.7||0.9||1.1||3||1.5|
|23||Chemical products and preparations, n.e.c.||3.8||8.0||1.1||1.6||3.2||4.4||0.2||1.1||0.1||0.2||0.2||0.6|
KEY: S = Estimate does not meet publication standards because of high sampling variability or poor response quality. - Zero of Less than half the unit shown; thus, it has been rounded to zero.
Classification of Transported Goods.
2 Ton-miles estimates are based on estimated distances traveled along a modeled transportation network.
NOTES: Value-of-shipment estimates are reported in current prices. More information on sampling error, confidentiality protection, nonsampling error, sample design, and definitions may be found at http://www.bts.gov/publications/commodity_flow_survey/.
SOURCE: U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2007 Economic Census: Transportation Commodity Flow Survey, December 2009.