Table B-16c. Estimated Standard Error of Percentage for Hazardous Material Shipment Characteristics for Export by Country of Destination: Percent of Total for 2002 and 1997

Table B-16c. Estimated Standard Error of Percentage for Hazardous Material Shipment Characteristics for Export by Country of Destination: Percent of Total for 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
2002 1997 2002 1997
Total
Canada 4.7 4.2 7.4 7.2
Mexico 3.3 4.8 7.5 S
All Others 5.4 3.5 9.8 7.6

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

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.

SOURCE: Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.