Table B-1b. Estimated Standard Error of Percentage for Shipment Characteristics by Mode of Transportation for State of Origin: Percent of Total for 2002 and 1997

Table B-1b. Estimated Standard Error of Percentage for Shipment Characteristics by Mode of Transportation for State of Origin: Percent of Total for 2002 and 1997

[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]

Excel | CSV

Mode of transportation Value Tons Ton-miles
2002 1997 2002 1997 2002 1997
All modes
Single modes 1.5 5.0 2.1 0.5 0.9 0.4
Truck 3.5 5.8 3.8 3.5 3.7 3.2
For-hire truck 2.9 4.1 4.5 3.9 4.1 3.4
Private truck 2.1 3.7 5.1 5.2 2.6 1.0
Rail 1.4 1.1 3.2 3.3 4.1 3.1
Water S S S
Shallow draft S S S
Great Lakes
Deep draft
Air (including truck and air) 4.4 S S S
Pipeline S S S S
Multiple modes 1.7 5.1 0.3 0.3 0.4 0.4
Parcel, USPS or courier 1.7 5.1 S
Truck and rail 0.2 0.3 0.1 0.3 0.3 0.4
Truck and water S S S S S S
Rail and water
Other multiple modes S S S
Other and unknown modes 1.0 0.7 S 0.5 S 0.2

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: Value-of-shipments estimates have not been adjusted for price changes. Appendix B tables provide estimated measures of sampling variability. The Introduction and appendixes give information on confidentially protection, sampling error, nonsampling error, sample design, and definitions. Links to this information on the Internet may be found at www.census.gov/cfs.
Coverage for the 2002 Commodity Flow Survey (CFS) differs from the previous surveys due to a change from the 1987 Standard Industrial Classification System to the 1997 North American Industry Classification System and other survey improvements. Therefore, data users are urged to use caution when comparing 2002 CFS estimates with estimates from prior years.

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