[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]
|Mode of transportation||Ton-miles||CV of average miles
|CV||Std. error of percent|
|Parcel, USPS or courier||–||–||–|
|Other and unknown modes||37.9||0.4||S|
– 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
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, Individual State Data, December 2004.