US Table B–12 ,,,,,,,,,,,,,
"Estimated Measures of Reliability for Shipment Characteristics by Commodity Group for the United States: 2002 and 1997
",,,,,,,,,,,,,
"[Estimates are shown as percents and are based on data from the 2002 and 1997 Commodity Flow Surveys]
",,,,,,,,,,,,,
SCTG code,Commodity description,Value,,,Tons,,,Ton-miles ,,,"Average miles 
per shipment",,
,,CV ,,Std. error of percent,CV ,,Std. error of percent,CV ,,Std. error of percent,CV ,,Std. error of percent
,,2002,1997,,2002,1997,,2002,1997,,2002,1997,
—,Total ,1.3,0.9,2.0,2.0,1.6,2.8,3.7,2.3,5.3,2.9,2.6,4.4
01–05,Agriculture products and fish,3.2,2.5,4.3,4.9,3.4,6.8,10.1,5.3,14.6,11.7,11.4,18.4
06–09,"Grains, alcohol, and tobacco products",3.5,2.7,4.8,4.3,2.8,5.7,5.0,2.6,6.6,11.6,13.2,23.6
10–14,"Stones, non-metallic minerals, and metallic ores",6.5,5.4,8.7,7.3,3.9,8.4,9.7,5.6,13.0,9.6,6.5,10.2
15–19,Coal and petroleum products,3.3,3.4,5.8,4.4,2.7,5.6,12.3,6.9,17.3,10.7,14.1,20.3
20–24, Pharmaceutical and chemical products,4.2,2.9,7.0,9.5,4.2,13.0,7.0,7.1,11.6,3.9,3.7,5.5
25–30,"Logs, wood products, and textile and leather",3.6,5.3,6.8,8.8,3.6,10.4,5.7,3.8,7.7,2.5,4.5,6.1
31–34,Base metal and machinery,3.8,1.3,4.4,6.2,6.3,9.4,5.9,3.0,7.8,4.3,4.7,6.3
35–38,"Electronic, motorized vehicles, 
and precision instruments",4.6,1.8,5.8,6.4,2.9,10.6,7.3,3.2,10.5,3.6,2.5,5.5
39–43,Furniture and miscellaneous manufactured products,2.4,3.4,7.4,7.1,6.2,14.0,9.0,5.4,14.3,6.4,4.3,6.9
—,Commodity Unknown,9.9,11.0,7.0,22.3,18.1,20.0,41.7,15.5,47.5,8.8,9.7,13.1
"
KEY: 
— 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.",,,,,,,,,,,,,

,,,,,,,,,,,,,