US Table B–4e,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"Estimated Standard Error of Percentage for Shipment Characteristics by Shipment Weight: Percent of Total for 2002, 1997 and 1993
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"[Estimates are shown as percents and are based on data from the 2002, 1997, and 1993 Commodity Flow Surveys]
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Shipment Weight,Value,,,Tons,,,Ton–miles,,,,,,,,,,,,,,,,,,,,,,,,,,
,2002,1997,1993,2002,1997,1993,2002,1997,1993,,,,,,,,,,,,,,,,,,,,,,,,
All shipment sizes,—,—,—,—,—,—,—,—,—,,,,,,,,,,,,,,,,,,,,,,,,
Less than 50 lbs,0.3,0.2,0.1,—,—,—,—,—,—,,,,,,,,,,,,,,,,,,,,,,,,
50 to 99 lbs,0.2,—,—,—,—,—,—,—,—,,,,,,,,,,,,,,,,,,,,,,,,
100 to 499 lbs,0.3,0.2,0.2,—,—,—,—,—,—,,,,,,,,,,,,,,,,,,,,,,,,
500 to 749 lbs,0.1,—,0.1,—,—,—,—,—,—,,,,,,,,,,,,,,,,,,,,,,,,
750 to 999 lbs,—,—,0.1,—,—,—,—,—,—,,,,,,,,,,,,,,,,,,,,,,,,
"1,000 to 9,999 lbs",0.3,0.4,0.5,0.1,—,0.1,0.2,0.2,0.2,,,,,,,,,,,,,,,,,,,,,,,,
"10,000 to 49,999 lbs",0.5,0.5,0.6,0.8,0.7,0.6,0.9,0.8,0.7,,,,,,,,,,,,,,,,,,,,,,,,
"50,000 to 99,999 lbs",0.2,0.2,0.2,0.5,0.5,0.6,0.3,0.3,0.2,,,,,,,,,,,,,,,,,,,,,,,,
"100,000 lbs or more",0.5,0.3,0.4,1.0,0.9,0.9,1.3,1.1,1.0,,,,,,,,,,,,,,,,,,,,,,,,
"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.",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
"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.",,,,,,,,,
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