[Estimates are shown as percents and are based on data from the 2002 Commodity Flow Survey]
|Shipment Weight||Value||Tons||Ton-miles||Average miles per shipment- coefficient of variation|
|Coefficient of variation of number||Standard error of percent||Coefficient of variation of number||Standard error of percent||Coefficient of variation of number||Standard error of percent|
|All shipment sizes||1.3||–||2.0||–||3.7||–||2.9|
|Less than 50 lbs||2.5||0.3||2.7||–||3.5||–||2.8|
|50 to 99 lbs||5.6||0.2||4.7||–||6.8||–||5.4|
|100 to 499 lbs||3.0||0.3||3.4||–||2.6||–||3.5|
|500 to 749 lbs||3.3||0.1||3.3||–||2.8||–||3.3|
|750 to 999 lbs||3.8||–||4.6||–||2.6||–||4.4|
|1,000 to 9,999 lbs||2.6||0.3||1.9||0.1||3.7||0.2||2.8|
|10,000 to 49,999 lbs||1.7||0.5||3.3||0.8||2.1||0.9||2.7|
|50,000 to 99,999 lbs||3.6||0.2||3.8||0.5||4.6||0.3||4.5|
|100,000 lbs or more||6.5||0.5||3.4||1.0||6.2||1.3||3.2|
– 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.
NOTE: The Introduction and appendixes give information onf 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.