[Estimates are based on data from the 2002 and 1997 Commodity Flow Surveys. Because of rounding, estimates may not be additive]
|Description||Value (percent)||Tons (percent)||Ton-miles (percent)|
|Toxic by Inhalation||1.1||1.4||1.2||1.3||2.0||3.5|
– 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.
Toxic by inhalation (TIH) gases and volatile liquids that are toxic when inhaled.
Bureau of Transportation Statistics (USDOT) and U.S. Census Bureau, 2002 Commodity Flow Survey, Hazmat Data, December 2004.