[Estimates are shown as percents and are based on data from the 2002 and 1997 Commodity Flow Surveys]
|Mode of transportation||Ton-miles
|Std. error of percent change||Average miles per shipment
|Std. error of percent change|
|Parcel, U.S.P.S. or courier||4.2||4.0||6.6||2.3||2.6||3.8|
|Other and unknown modes||9.7||8.5||7.8||13.0||9.6||17.2|
– Represents data cell equal to zero or less than 1 unit of measure.
S Estimate does not meet publication standards because of high sampling variability or poor response quality. CV Coefficient of variation of number.
NOTES: The Introduction and appendixes give information on confidentiality protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found at www.census.gov/cfs.
SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, United States Data, December 2004.