Table B-20 - Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for State of Origin: 2002 and 1997
Table B-20 - Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for State of Origin: 2002 and 1997
[Estimates are based on data from the Commodity Flow Survey. Because of rounding, estimates may not be additive]
All Commodities
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 5.2 | 3.8 | 7.9 | 9.1 | 12.7 | 15.4 | 14.0 | 5.4 | 22.8 | 9.5 | 4.7 | 12.6 |
Single modes | 3.9 | 4.1 | 6.7 | 9.1 | 13.1 | 15.2 | 15.1 | 5.1 | 24.1 | 8.0 | 11.0 | 13.5 |
Truck | 4.2 | 4.5 | 7.3 | 11.3 | 14.2 | 14.7 | 7.8 | 5.3 | 9.9 | 8.3 | 10.2 | 14.3 |
Rail | 26.5 | 12.3 | 31.8 | 25.0 | 13.3 | 72.7 | 15.5 | 12.1 | 58.9 | 7.7 | 6.4 | 11.0 |
Water | S | 31.7 | S | S | 34.7 | S | S | S | S | 33.3 | 31.3 | 37.2 |
Air (including truck and air) | 15.7 | 13.2 | 13.5 | 41.6 | 17.9 | 44.4 | 37.8 | 19.0 | 49.1 | 9.0 | 7.7 | 11.6 |
Pipeline | S | 42.4 | S | S | 44.8 | S | S | S | S | S | S | S |
Multiple modes | 18.6 | 6.4 | 29.9 | 13.9 | 14.6 | 39.2 | 16.9 | 8.8 | 44.6 | 4.2 | 3.8 | 6.0 |
Parcel, USPS or courier | 18.3 | 6.9 | 23.3 | 16.8 | 6.8 | 20.3 | 20.0 | 7.0 | 26.8 | 4.4 | 3.8 | 6.1 |
Truck and rail | S | 13.2 | S | 24.2 | 34.0 | 121.9 | 25.5 | 14.6 | 96.9 | 6.7 | 11.3 | 13.9 |
Other multiple modes | 45.9 | 44.9 | 104.2 | 45.6 | 49.3 | 61.4 | S | S | S | 32.8 | 24.1 | 14.1 |
Other and unknown modes | 23.4 | 12.0 | 35.5 | 36.9 | 16.1 | 114.1 | 30.2 | 35.6 | 49.0 | S | 20.6 | S |
SCTG 01-05, Agriculture products and fish
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 16.0 | 8.4 | 21.3 | 33.7 | 12.9 | 82.1 | S | 21.9 | S | 35.2 | 25.4 | 26.6 |
Single modes | 16.6 | 9.1 | 23.6 | 33.7 | 12.4 | 86.4 | S | 23.5 | S | 42.9 | 14.3 | 50.1 |
Truck | 20.0 | 10.2 | 23.5 | 33.1 | 13.5 | 60.6 | 45.2 | 20.9 | 65.7 | 45.0 | 14.9 | 51.1 |
Rail | S | 42.7 | S | S | 40.5 | S | S | 35.0 | S | 21.9 | 21.9 | 47.6 |
Water | S | 31.7 | S | S | 34.7 | S | S | S | S | 29.2 | 27.6 | 43.0 |
Air (including truck and air) | S | 47.4 | S | S | S | S | S | S | S | 30.3 | 25.8 | 57.8 |
Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
Multiple modes | S | 35.2 | S | S | S | S | S | S | S | 21.5 | 13.6 | 20.2 |
Parcel, USPS or courier | S | 40.6 | S | S | 43.6 | S | S | 47.2 | S | 21.5 | 13.3 | 20.0 |
Truck and rail | – | S | S | – | S | S | – | S | S | – | S | S |
Other multiple modes | – | – | – | – | – | – | – | – | – | – | – | – |
Other and unknown modes | S | 21.2 | S | S | 45.2 | S | S | S | S | 34.4 | S | S |
SCTG 06-09, Grains, alcohol, and tobacco products
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 10.0 | 3.4 | 13.1 | 17.6 | 7.5 | 23.9 | 23.3 | 10.8 | 28.8 | 30.3 | 24.1 | 28.5 |
Single modes | 10.5 | 3.7 | 13.9 | 17.6 | 7.7 | 24.4 | 23.8 | 11.6 | 30.8 | 34.2 | 17.6 | 26.7 |
Truck | 10.5 | 3.5 | 14.1 | 17.8 | 7.0 | 26.1 | 24.1 | 8.2 | 35.9 | 34.9 | 17.7 | 27.1 |
Rail | 39.4 | 30.4 | 1.7 | 38.6 | 37.6 | 2.5 | 40.0 | 42.8 | 3.0 | 34.7 | 14.7 | 22.5 |
Water | – | – | – | – | – | – | – | – | – | – | – | – |
Air (including truck and air) | S | S | S | S | S | S | S | S | S | 26.9 | S | S |
Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
Multiple modes | 34.2 | 28.7 | 59.4 | 42.4 | 26.7 | 19.6 | 38.6 | 27.0 | 14.9 | 14.2 | 11.2 | 15.8 |
Parcel, USPS or courier | S | 35.5 | S | 44.9 | 32.9 | 68.9 | 49.5 | 38.1 | 72.2 | 17.3 | 11.9 | 18.3 |
Truck and rail | 43.4 | 26.8 | 53.3 | S | 27.3 | S | 46.7 | 27.3 | 15.0 | 17.5 | 7.6 | 19.7 |
Other multiple modes | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
Other and unknown modes | 36.6 | 36.7 | 17.7 | 45.9 | 33.1 | 17.0 | 44.7 | 35.7 | 12.3 | S | S | S |
SCTG 10-14, Stones, non-metallic minerals, and metallic ores
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 25.4 | 16.8 | 30.8 | 11.5 | 27.8 | 22.4 | 30.9 | 26.3 | 125.4 | 37.4 | 22.2 | 96.1 |
Single modes | 27.3 | 17.1 | 30.4 | 12.2 | 28.1 | 21.5 | 31.3 | 26.7 | 123.2 | 41.9 | 23.9 | 114.1 |
Truck | 29.9 | 14.0 | 29.1 | 17.8 | 29.1 | 17.5 | 30.1 | 34.9 | 27.0 | 31.5 | 25.0 | 52.5 |
Rail | 28.1 | 43.5 | 63.3 | 33.1 | 36.9 | 235.6 | 33.8 | 27.4 | 412.0 | 18.6 | 27.3 | 69.9 |
Water | – | – | – | – | – | – | – | – | – | – | – | – |
Air (including truck and air) | – | – | – | – | – | – | – | – | – | – | – | – |
Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
Multiple modes | S | S | S | S | S | S | S | S | S | 27.7 | S | S |
Parcel, USPS or courier | S | S | S | S | S | S | S | S | S | 27.7 | 28.3 | 43.0 |
Truck and rail | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
Other multiple modes | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
Other and unknown modes | 37.5 | 40.0 | 382.1 | 40.6 | S | S | 48.4 | S | S | 35.5 | S | S |
SCTG 15-19, Coal and petroleum products
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 24.6 | 36.2 | 17.5 | 24.9 | 35.1 | 16.5 | 27.7 | 32.4 | 82.7 | 35.6 | 16.9 | 127.0 |
Single modes | 24.4 | 36.2 | 17.3 | 24.6 | 35.1 | 16.3 | 26.8 | 32.4 | 79.1 | 34.6 | 18.1 | 123.7 |
Truck | 27.6 | 38.5 | 17.1 | 29.7 | 38.2 | 14.5 | 37.5 | 42.4 | 41.1 | 40.2 | 17.8 | 116.9 |
Rail | 35.4 | 42.8 | 353.5 | 35.3 | 34.9 | 482.3 | 33.6 | 41.8 | 543.3 | 24.7 | 25.4 | 35.0 |
Water | – | – | – | – | – | – | – | – | – | – | – | – |
Air (including truck and air) | S | S | S | S | S | S | S | S | S | 31.6 | 31.6 | 382.2 |
Pipeline | – | S | S | – | S | S | S | S | S | S | S | S |
Multiple modes | S | 44.5 | S | S | 39.4 | S | S | 48.9 | S | 33.0 | 43.0 | 125.5 |
Parcel, USPS or courier | S | 44.5 | S | S | 39.4 | S | S | 48.9 | S | 30.2 | 43.0 | 116.0 |
Truck and rail | S | – | S | S | – | S | S | – | S | 30.0 | – | – |
Other multiple modes | – | – | – | – | – | – | – | – | – | – | – | – |
Other and unknown modes | S | 37.3 | S | S | S | S | S | S | S | S | 22.2 | S |
SCTG 20-24, Pharmaceutical and chemical products
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 12.2 | 8.3 | 16.0 | 30.2 | 11.1 | 68.6 | 24.6 | 11.5 | 65.4 | 11.5 | 13.9 | 12.4 |
Single modes | 12.4 | 12.0 | 19.8 | 31.2 | 11.6 | 69.7 | 25.9 | 11.8 | 60.5 | 17.0 | 21.9 | 26.5 |
Truck | 13.4 | 11.9 | 20.1 | 34.1 | 12.7 | 74.5 | 29.6 | 13.2 | 70.9 | 15.3 | 17.3 | 29.3 |
Rail | S | 31.9 | S | S | 31.6 | S | S | 28.3 | S | 26.1 | 18.2 | 18.0 |
Water | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
Air (including truck and air) | 47.6 | 36.9 | 121.2 | 40.7 | 32.2 | 45.7 | S | 34.9 | S | 8.9 | 9.4 | 10.1 |
Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
Multiple modes | 19.0 | 19.1 | 23.2 | 41.7 | 20.0 | 284.5 | 43.0 | 28.6 | 555.9 | 14.9 | 10.5 | 14.4 |
Parcel, USPS or courier | 18.9 | 19.6 | 15.1 | 19.2 | 22.0 | 13.8 | 25.5 | 25.5 | 20.0 | 15.9 | 10.5 | 14.8 |
Truck and rail | 43.7 | 49.7 | 763.1 | 44.4 | 43.3 | S | 44.4 | 49.2 | S | 21.5 | 41.8 | 76.5 |
Other multiple modes | S | S | S | S | S | S | S | S | S | 49.9 | 31.6 | 31.1 |
Other and unknown modes | 44.1 | 31.3 | 20.5 | 44.0 | 19.9 | 15.4 | S | 32.9 | S | S | 31.5 | S |
SCTG 25-30, Logs, wood products, and textile and leather
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 8.1 | 6.2 | 12.6 | 10.9 | 11.6 | 13.1 | 10.0 | 14.6 | 12.5 | 6.5 | 4.8 | 9.4 |
Single modes | 5.7 | 7.9 | 10.9 | 11.6 | 11.7 | 13.2 | 10.7 | 14.9 | 12.2 | 12.5 | 12.6 | 17.7 |
Truck | 5.7 | 8.2 | 11.8 | 12.5 | 12.8 | 15.5 | 11.4 | 16.8 | 14.6 | 9.3 | 10.0 | 13.7 |
Rail | 20.0 | 12.9 | 12.0 | 18.6 | 17.6 | 10.7 | 13.7 | 16.8 | 8.9 | 14.0 | 10.6 | 20.8 |
Water | – | – | – | – | – | – | – | – | – | – | – | – |
Air (including truck and air) | S | 20.6 | S | S | 25.2 | S | 48.4 | 32.9 | 131.9 | 20.1 | 14.2 | 19.1 |
Pipeline | – | S | S | – | S | S | S | S | S | S | S | S |
Multiple modes | 33.8 | 8.4 | 73.1 | 43.1 | 18.4 | 83.2 | 44.1 | 22.9 | 93.7 | 3.1 | 2.9 | 4.3 |
Parcel, USPS or courier | 35.5 | 9.7 | 81.5 | 34.4 | 11.3 | 57.2 | 37.2 | 12.9 | 74.7 | 3.2 | 2.9 | 4.4 |
Truck and rail | 37.1 | 22.5 | 41.8 | S | 34.3 | S | S | 31.6 | S | 13.4 | 8.3 | 18.0 |
Other multiple modes | S | S | S | S | S | S | S | S | S | 39.0 | 31.6 | 17.4 |
Other and unknown modes | S | 33.8 | S | S | 33.9 | S | 38.6 | 35.5 | 146.5 | S | S | S |
SCTG 31-34, Base metal and machinery
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 9.5 | 4.2 | 9.6 | 49.9 | 11.9 | 44.7 | 10.8 | 15.7 | 16.2 | 18.5 | 11.0 | 16.1 |
Single modes | 8.8 | 4.0 | 8.8 | S | 12.4 | S | 12.0 | 16.3 | 17.7 | 29.6 | 11.5 | 26.3 |
Truck | 9.0 | 4.2 | 8.9 | S | 12.6 | S | 13.2 | 9.5 | 16.2 | 30.7 | 11.0 | 30.8 |
Rail | 23.9 | 34.3 | 57.9 | 21.3 | 48.7 | 21.1 | 26.4 | S | S | 17.6 | 16.4 | 21.9 |
Water | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
Air (including truck and air) | S | 14.7 | S | S | 35.9 | S | S | 41.6 | S | 6.3 | 6.1 | 9.5 |
Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
Multiple modes | 19.5 | 9.4 | 20.7 | 27.8 | 12.5 | 26.4 | 27.7 | 24.8 | 23.1 | 9.3 | 11.3 | 13.6 |
Parcel, USPS or courier | 19.1 | 10.6 | 21.3 | 18.4 | 15.6 | 14.4 | 21.5 | 18.3 | 20.2 | 9.4 | 11.3 | 13.6 |
Truck and rail | S | 25.5 | S | S | 30.1 | S | 38.4 | 31.7 | 19.2 | 27.3 | 11.3 | 16.6 |
Other multiple modes | S | S | S | S | S | S | S | S | S | 30.0 | 28.4 | 22.9 |
Other and unknown modes | 37.7 | 30.3 | 64.1 | 37.0 | 41.6 | 37.9 | 44.6 | S | S | S | S | S |
SCTG 35-38, Electronic, motorized vehicles, and precision instruments
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 24.2 | 11.1 | 30.5 | 39.5 | 13.1 | 69.8 | 20.7 | 15.7 | 33.5 | 15.0 | 15.3 | 21.7 |
Single modes | 16.8 | 10.8 | 20.3 | 14.7 | 13.3 | 17.5 | 12.8 | 16.4 | 20.1 | 19.7 | 45.7 | 73.8 |
Truck | 17.9 | 13.4 | 23.9 | 14.9 | 13.8 | 18.2 | 13.1 | 18.2 | 22.1 | 20.5 | S | S |
Rail | S | 29.4 | S | 49.4 | 30.9 | 29.5 | S | 30.5 | S | 22.8 | 20.7 | 48.4 |
Water | – | – | – | – | – | – | – | – | – | – | – | – |
Air (including truck and air) | 13.6 | 19.6 | 9.9 | 24.0 | 33.8 | 26.1 | 28.7 | 20.9 | 31.1 | 10.5 | 7.1 | 14.3 |
Pipeline | S | – | S | S | – | S | S | S | S | S | S | S |
Multiple modes | S | 21.8 | S | S | 27.7 | S | S | 30.7 | S | 7.6 | 8.7 | 12.4 |
Parcel, USPS or courier | 29.7 | 21.9 | 24.6 | 43.9 | 29.0 | 48.6 | 47.0 | 33.5 | 61.5 | 7.6 | 8.7 | 12.3 |
Truck and rail | S | 44.8 | S | S | 47.5 | S | S | 42.4 | S | 24.7 | 21.4 | 28.0 |
Other multiple modes | S | S | S | S | S | S | S | S | S | 31.6 | 31.6 | 18.4 |
Other and unknown modes | 38.4 | 25.4 | 73.3 | S | 27.0 | S | S | 28.5 | S | S | 38.7 | S |
SCTG 39-43, Furniture, mixed freight and misc manufactured products
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 5.8 | 6.4 | 20.7 | 15.1 | 10.7 | 27.9 | 10.8 | 15.1 | 21.5 | 7.5 | 7.7 | 10.9 |
Single modes | 5.2 | 6.1 | 19.1 | 15.6 | 11.0 | 28.3 | 12.2 | 15.1 | 21.5 | 12.1 | 14.1 | 13.6 |
Truck | 5.2 | 5.9 | 19.2 | 15.7 | 10.6 | 30.6 | 12.7 | 15.3 | 23.8 | 12.9 | 15.2 | 13.6 |
Rail | 37.1 | 24.6 | 10.9 | 35.3 | 16.7 | 18.2 | 43.4 | 20.4 | 17.9 | 26.6 | 17.6 | 75.2 |
Water | S | S | S | S | S | S | S | S | S | S | 31.6 | S |
Air (including truck and air) | 26.9 | 35.2 | 108.3 | 26.4 | 26.8 | 50.0 | 41.0 | 31.8 | 95.1 | 10.8 | 14.8 | 25.8 |
Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
Multiple modes | 24.9 | 18.2 | 68.7 | 22.9 | 19.9 | 57.1 | 22.9 | 21.7 | 56.2 | 5.1 | 3.7 | 6.1 |
Parcel, USPS or courier | 26.4 | 18.4 | 70.4 | 28.8 | 21.8 | 66.0 | 30.7 | 26.3 | 70.3 | 5.1 | 3.7 | 6.1 |
Truck and rail | S | 31.5 | S | S | 37.3 | S | S | 35.7 | S | 28.7 | 21.7 | 36.7 |
Other multiple modes | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
Other and unknown modes | 46.1 | 19.4 | 203.3 | S | 20.0 | S | 39.0 | 21.0 | 206.2 | 37.7 | 21.3 | 30.2 |
Commodity Unknown
Mode of transportation | Value | Tons | Ton-miles | Average miles per shipment | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | CV 2002 |
CV 1997 |
Std. error of percent change 1997-2002 | |
All modes | 41.6 | 35.2 | 49.4 | 46.6 | S | S | 48.3 | 39.4 | 21.9 | 35.6 | 22.9 | 20.0 |
Single modes | 40.7 | 35.5 | 38.1 | 47.8 | S | S | S | 37.7 | S | 28.9 | 28.4 | 41.9 |
Truck | 43.0 | 35.8 | 38.4 | 47.8 | S | S | S | 35.1 | S | 31.6 | 28.6 | 40.3 |
Rail | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
Water | – | – | – | – | – | – | – | – | – | – | – | – |
Air (including truck and air) | S | S | S | S | S | S | S | S | S | 29.8 | 31.5 | 76.9 |
Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
Multiple modes | S | 49.8 | S | S | S | S | S | S | S | 39.7 | 25.7 | 15.8 |
Parcel, USPS or courier | S | S | S | S | 31.6 | S | S | 31.0 | S | 39.7 | 25.6 | 15.8 |
Truck and rail | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
Other multiple modes | – | – | – | – | – | – | – | – | – | – | – | – |
Other and unknown modes | S | S | S | S | S | S | S | S | S | S | S | S |
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.
CV Coefficient of variation of number
NOTE: The Introduction and appendixes give information onf 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, Individual State Data, December 2004.