HAZMAT Table B–16b ,,,,,,
Estimated Measures of Reliability for Hazardous Material Shipment Characteristics for Export by Country of Destination: 2002 and 1997,,,,,,
"[Estimates are shown as percents and are based on data from the 2002 and 1997 Commodity Flow Surveys]
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Country,Value,,,Tons,,
,CV ,,Std. error of percent,CV ,,Std. error of percent
,2002,1997,,2002,1997,
Total,16.2,35.7,32.9,24.9,28.5,35.4
Canada,19.9,43.7,32.1,26.1,35.7,26.7
Mexico,28.5,43.3,32.0,29.9,S,S
All Others,20.3,35.8,40.1,39.0,36.6,90.9
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KEY: 
— Represents an estimate equal to zero or less than 1 unit of measure.  
S Estimate does not meet publication standards because of highly sampling variability or poor response quality. 
CV Coefficient of variation of number",,,,,,
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NOTE: 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.",,,,,,
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SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.",,,,,,