Table B-2d. Estimated Standard Errors for Shipment Characteristics by Total Modal Activity for the United States: Annualized Growth Rate for 1997 to 2002 and 1993 to 2002
Monday, July 2, 2012
Table B-2d. Estimated Standard Errors for Shipment Characteristics by Total Modal Activity for the United States: Annualized Growth Rate for 1997 to 2002 and 1993 to 2002
[Estimates are shown as percents and are based on data from the 2002, 1997, and 1993 Commodity Flow Surveys]
| Mode of transportation | Ton-miles | Average miles per shipment (percent) | ||
|---|---|---|---|---|
| 1997 to 2002 | 1993 to 2002 | 1997 to 2002 | 1993 to 2002 | |
| Total | 0.9 | 0.5 | 0.8 | 0.5 |
| Truck | 0.7 | 0.3 | 0.9 | 0.4 |
| Rail | 1.9 | 0.9 | 1.3 | 0.9 |
| Shallow draft | 2.3 | 1.6 | 5.5 | 1.4 |
| Great Lakes | 4.8 | 2.7 | 3.8 | 3.0 |
| Deep draft | 5.0 | 2.7 | 3.5 | 1.5 |
| Air | 3.5 | 1.5 | 1.0 | 0.5 |
| Parcel, U.S.P.S. or courier | 1.2 | 0.5 | 0.7 | 0.4 |
| Pipeline | S | S | S | S |
| Other and unknown modes | 2.3 | 2.6 | 3.3 | 3.0 |
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.
NOTES: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, United States Data, December 2004.