[Estimates are based on data from the 2002 Commodity Flow Survey. Because of rounding, estimates may not be additive]
|Packing Group I||177,392||26.9||577,058||26.3||80,162||24.5|
– 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.
Note: Packing Groups I, II, and III reflect the level of hazard associated with the material being shipped. Packing Group I is the most rigorous.
Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.