Table B-20 - Estimated Measures of Reliability for Shipment Characteristics by Commodity Group and Mode of Transportation for State of Origin: 2002 and 1997
Monday, July 2, 2012
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 | 6.5 | 5.2 | 14.7 | 11.0 | 6.4 | 16.6 | 15.7 | 4.5 | 22.4 | 7.1 | 6.4 | 14.1 |
| Single modes | 7.3 | 5.3 | 15.8 | 11.1 | 6.2 | 16.9 | 16.4 | 4.3 | 23.6 | 7.8 | 7.8 | 14.6 |
| Truck | 7.2 | 5.7 | 15.2 | 11.3 | 7.3 | 16.1 | 8.3 | 6.4 | 12.7 | 8.7 | 6.5 | 13.8 |
| Rail | 24.0 | 10.4 | 33.0 | 38.2 | 15.4 | 58.9 | 32.4 | 15.2 | 46.1 | 12.2 | 9.8 | 13.4 |
| Water | S | S | S | S | S | S | S | S | S | S | S | S |
| Air (including truck and air) | 22.6 | 15.7 | 283.7 | S | 18.3 | S | S | 14.1 | S | 2.2 | 3.4 | 4.5 |
| Pipeline | S | 37.6 | S | S | 49.4 | S | S | S | S | S | S | S |
| Multiple modes | 9.1 | 6.0 | 23.7 | 30.4 | 45.2 | 36.0 | 33.5 | 15.8 | 46.0 | 6.9 | 5.6 | 11.4 |
| Parcel, USPS or courier | 10.4 | 6.6 | 28.0 | 13.6 | 11.8 | 24.1 | 17.9 | 20.4 | 41.8 | 6.9 | 5.7 | 11.4 |
| Truck and rail | S | 33.2 | S | 32.5 | S | S | 38.4 | 22.3 | 48.8 | 10.2 | 14.5 | 29.3 |
| Other multiple modes | S | S | S | S | 42.0 | S | S | 48.2 | S | 36.5 | 41.8 | 52.5 |
| Other and unknown modes | 14.6 | 29.0 | 31.9 | 26.1 | 25.0 | 30.1 | 35.3 | 26.7 | 33.4 | 18.7 | 17.0 | 32.0 |
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 | 23.5 | 14.7 | 40.9 | S | 24.4 | S | 38.2 | 30.4 | 56.1 | 39.0 | 24.9 | 50.2 |
| Single modes | 24.8 | 13.5 | 43.0 | S | 22.0 | S | 41.9 | 33.7 | 65.7 | 45.7 | 20.3 | 58.5 |
| Truck | 25.2 | 13.8 | 44.0 | S | 23.1 | S | S | 36.5 | S | 45.7 | 20.5 | 58.9 |
| Rail | 45.8 | S | S | 49.2 | S | S | 45.7 | S | S | 27.8 | 24.5 | 42.2 |
| Water | 42.6 | S | S | 48.0 | S | S | 47.0 | S | S | 21.2 | 31.6 | 25.0 |
| Air (including truck and air) | S | – | S | S | – | S | S | – | S | 29.8 | – | – |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | S | 38.2 | S | S | S | S | S | S | S | 28.4 | 20.5 | 14.3 |
| Parcel, USPS or courier | S | S | S | S | S | S | S | S | S | 28.2 | 21.0 | 13.4 |
| Truck and rail | S | 46.7 | S | S | S | S | S | S | S | 31.6 | 44.6 | 166.2 |
| Other multiple modes | – | – | – | – | – | – | – | – | – | – | – | – |
| Other and unknown modes | S | S | S | 42.0 | S | S | 36.3 | S | S | 24.6 | 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 | 12.8 | 7.4 | 16.4 | 14.6 | 9.5 | 17.5 | 10.9 | 17.2 | 22.6 | 16.8 | 12.2 | 69.7 |
| Single modes | 13.0 | 7.6 | 16.4 | 14.5 | 8.8 | 17.2 | 11.0 | 18.7 | 24.5 | 34.2 | 13.6 | 42.0 |
| Truck | 13.2 | 7.3 | 16.4 | 15.4 | 8.0 | 16.7 | 12.4 | 12.4 | 20.2 | 35.4 | 12.2 | 42.1 |
| Rail | 12.9 | 36.6 | 35.5 | 15.3 | 34.9 | 31.6 | 15.3 | 44.6 | 31.3 | 9.8 | 21.8 | 15.4 |
| Water | S | – | S | S | – | S | S | – | S | 28.4 | – | – |
| Air (including truck and air) | S | S | S | S | S | S | S | S | S | 32.3 | 29.2 | 39.4 |
| Pipeline | – | S | S | – | S | S | S | S | S | S | S | S |
| Multiple modes | 20.8 | 41.3 | 98.1 | 20.8 | S | S | 23.7 | 46.6 | 32.4 | 25.3 | S | S |
| Parcel, USPS or courier | 36.8 | 40.7 | 832.8 | S | S | S | S | 35.9 | S | 20.4 | 36.4 | 116.3 |
| Truck and rail | 37.6 | 45.6 | 58.0 | 24.3 | S | S | 28.5 | 46.7 | 29.5 | 17.0 | 26.3 | 52.9 |
| Other multiple modes | – | – | – | – | – | – | – | – | – | – | – | – |
| Other and unknown modes | S | 36.2 | S | 38.8 | S | S | S | S | S | 30.7 | 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 | 14.1 | 17.1 | 17.1 | 15.5 | 14.6 | 17.9 | 28.4 | 16.6 | 18.2 | 42.9 | 34.6 | 34.3 |
| Single modes | 16.2 | 15.3 | 18.2 | 15.8 | 14.6 | 18.0 | 33.1 | 16.0 | 18.9 | 28.9 | 42.1 | 32.3 |
| Truck | 15.8 | 16.2 | 19.1 | 16.0 | 14.9 | 18.7 | 34.8 | 18.7 | 23.4 | 29.2 | 41.2 | 32.9 |
| Rail | S | 27.5 | S | S | 34.3 | S | S | 26.5 | S | 31.6 | 22.4 | 25.1 |
| Water | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
| Air (including truck and air) | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | S | 45.2 | S | S | S | S | S | S | S | 31.6 | 39.5 | 26.3 |
| Parcel, USPS or courier | S | S | S | S | S | S | S | S | S | 31.6 | 40.0 | 20.3 |
| Truck and rail | – | S | S | – | S | S | – | S | S | – | 28.9 | – |
| Other multiple modes | S | S | S | S | S | S | S | S | S | 31.6 | 25.8 | 42.3 |
| Other and unknown modes | S | S | S | S | 40.7 | S | S | S | S | 29.9 | 31.9 | 27.3 |
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 | 21.9 | 10.2 | 65.7 | 29.8 | 10.9 | 67.7 | 28.0 | 34.9 | 123.7 | 11.5 | 40.3 | 45.0 |
| Single modes | 21.9 | 10.0 | 66.4 | 29.8 | 10.8 | 67.9 | 28.0 | 34.6 | 124.4 | 12.7 | 40.7 | 44.4 |
| Truck | 13.6 | 10.4 | 34.1 | 13.0 | 10.7 | 23.9 | 10.8 | 14.2 | 32.4 | 10.2 | 40.8 | 38.0 |
| Rail | S | S | S | 45.0 | S | S | 45.5 | S | S | 26.0 | 31.8 | 86.8 |
| Water | S | S | S | S | S | S | S | S | S | S | 31.9 | S |
| Air (including truck and air) | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | 44.3 | S | S | 43.9 | S | S | S | S | S | 24.6 | 28.8 | 107.4 |
| Parcel, USPS or courier | 44.3 | S | S | 43.9 | S | S | S | S | S | 24.6 | 28.8 | 107.4 |
| Truck and rail | – | – | – | – | – | – | – | – | – | – | – | – |
| Other multiple modes | – | – | – | – | – | – | – | – | – | – | – | – |
| Other and unknown modes | S | S | S | S | 48.2 | S | S | S | S | 32.9 | S | 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 | 22.4 | 4.9 | 81.2 | 48.6 | 10.7 | 97.6 | 45.3 | 7.3 | 114.0 | 21.7 | 12.8 | 30.1 |
| Single modes | 24.1 | 5.6 | 88.8 | 49.2 | 11.1 | 100.5 | 46.1 | 7.9 | 119.5 | 16.0 | 10.4 | 37.7 |
| Truck | 27.6 | 6.1 | 97.5 | 25.4 | 10.9 | 36.0 | 22.7 | 8.0 | 42.3 | 15.2 | 10.8 | 19.1 |
| Rail | 44.5 | 13.3 | 62.5 | S | 16.1 | S | S | 13.8 | S | 17.5 | 8.2 | 17.3 |
| Water | S | S | S | S | S | S | S | S | S | S | 31.6 | S |
| Air (including truck and air) | 18.3 | S | S | 25.3 | 34.1 | 148.3 | 21.3 | 35.8 | 115.3 | 3.8 | 24.3 | 22.3 |
| Pipeline | S | 46.6 | S | S | S | S | S | S | S | S | S | S |
| Multiple modes | 26.9 | 34.1 | 140.7 | 22.8 | 26.2 | 28.3 | 20.5 | 23.8 | 41.0 | 39.4 | 9.5 | 25.0 |
| Parcel, USPS or courier | 27.5 | 14.8 | 178.8 | 34.2 | 11.5 | 66.7 | 26.5 | 17.7 | 56.1 | 39.5 | 9.5 | 25.0 |
| Truck and rail | 35.9 | S | S | 46.2 | 36.0 | 28.1 | 37.9 | 32.8 | 53.8 | 21.7 | 19.8 | 62.5 |
| Other multiple modes | S | S | S | S | S | S | S | S | S | 30.1 | 31.6 | 369.2 |
| Other and unknown modes | 32.7 | 38.7 | 132.9 | S | 37.1 | S | 49.4 | 49.8 | 19.6 | 29.9 | S | 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 | 9.9 | 12.3 | 14.8 | 11.7 | 6.7 | 15.3 | 12.1 | 11.8 | 15.6 | 7.7 | 5.5 | 11.9 |
| Single modes | 10.6 | 13.9 | 16.7 | 12.0 | 6.7 | 15.8 | 12.1 | 11.9 | 16.0 | 15.3 | 6.3 | 18.2 |
| Truck | 10.1 | 14.6 | 16.7 | 13.4 | 7.7 | 18.9 | 14.0 | 15.8 | 21.7 | 14.2 | 7.9 | 14.2 |
| Rail | 13.9 | 15.2 | 17.1 | 16.3 | 17.0 | 16.4 | 21.0 | 19.1 | 18.2 | 7.6 | 9.8 | 10.7 |
| Water | S | S | S | S | S | S | S | S | S | 31.6 | S | S |
| Air (including truck and air) | S | 23.7 | S | S | 33.4 | S | S | 17.0 | S | 8.1 | 7.0 | 12.9 |
| Pipeline | – | S | S | – | S | S | S | S | S | S | S | S |
| Multiple modes | 19.3 | 7.5 | 18.9 | 15.4 | 9.9 | 15.0 | 22.9 | 17.3 | 22.0 | 3.9 | 6.6 | 10.2 |
| Parcel, USPS or courier | 21.2 | 9.4 | 22.3 | 25.0 | 11.0 | 33.7 | 22.3 | 12.4 | 30.6 | 3.9 | 6.6 | 10.2 |
| Truck and rail | 44.5 | 18.8 | 20.0 | 48.6 | 21.0 | 27.0 | S | 26.4 | S | 21.1 | 12.5 | 27.5 |
| Other multiple modes | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
| Other and unknown modes | 25.9 | 33.3 | 21.0 | 21.9 | 26.0 | 15.0 | 26.9 | 46.5 | 7.9 | 40.5 | 33.0 | 49.8 |
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 | 9.4 | 10.6 | 16.0 | 28.7 | 25.0 | 45.2 | 6.8 | 9.0 | 10.9 | 13.4 | 9.7 | 26.5 |
| Single modes | 9.1 | 11.6 | 16.8 | 29.0 | 25.3 | 46.0 | 6.7 | 8.1 | 10.3 | 15.3 | 6.4 | 19.4 |
| Truck | 9.6 | 12.3 | 18.0 | 30.2 | 26.1 | 48.2 | 7.2 | 6.3 | 10.0 | 14.8 | 7.8 | 20.1 |
| Rail | 44.2 | 28.7 | 33.0 | S | 18.2 | S | 44.2 | 25.3 | 30.1 | 35.2 | 10.4 | 32.5 |
| Water | – | S | S | – | S | S | – | S | S | – | S | S |
| Air (including truck and air) | 32.4 | 29.4 | 64.0 | S | 31.7 | S | S | 27.9 | S | 4.0 | 6.3 | 7.8 |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | 28.4 | 17.3 | 47.9 | 31.6 | 24.7 | 48.7 | 34.6 | 15.3 | 71.9 | 8.8 | 11.3 | 23.2 |
| Parcel, USPS or courier | 30.3 | 17.5 | 47.9 | 28.6 | 13.5 | 31.8 | 33.1 | 14.3 | 53.5 | 8.9 | 11.3 | 23.4 |
| Truck and rail | 38.7 | 40.5 | 520.5 | S | 42.3 | S | S | S | S | 27.1 | 25.6 | 22.6 |
| Other multiple modes | S | S | S | S | S | S | S | 47.9 | S | 31.6 | S | S |
| Other and unknown modes | 41.6 | 9.5 | 26.2 | 43.6 | 27.4 | 32.8 | 46.7 | 38.8 | 24.8 | 26.0 | 22.0 | 53.4 |
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 | 9.6 | 15.6 | 33.2 | 20.9 | 16.4 | 54.0 | 22.8 | 10.5 | 53.7 | 9.7 | 11.9 | 26.2 |
| Single modes | 9.1 | 13.6 | 27.9 | 21.9 | 13.5 | 52.8 | 24.2 | 10.5 | 51.6 | 21.5 | 18.0 | 55.4 |
| Truck | 14.9 | 14.7 | 30.4 | 22.0 | 13.6 | 53.6 | 24.6 | 11.2 | 55.0 | 25.4 | 20.8 | 69.1 |
| Rail | S | 43.7 | S | S | 25.2 | S | S | 24.9 | S | 29.9 | 17.3 | 13.0 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | 44.6 | 18.8 | 389.0 | S | 18.4 | S | S | 19.3 | S | 4.9 | 4.3 | 7.4 |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | 29.2 | 20.2 | 116.6 | 39.0 | 8.6 | 181.9 | 39.1 | 19.8 | 362.5 | 8.5 | 9.2 | 17.9 |
| Parcel, USPS or courier | 20.4 | 20.6 | 71.6 | 19.0 | 7.9 | 33.9 | 28.4 | 11.3 | 68.6 | 8.6 | 9.2 | 17.9 |
| Truck and rail | S | 39.8 | S | S | 47.9 | S | S | S | S | 27.7 | 21.4 | 23.2 |
| Other multiple modes | S | – | S | S | – | S | S | – | S | 27.9 | – | – |
| Other and unknown modes | 24.3 | S | S | 26.0 | S | S | 34.3 | 26.6 | 142.8 | 18.9 | 34.1 | 40.9 |
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 | 10.1 | 4.8 | 27.7 | 26.2 | 16.2 | 69.0 | 37.4 | 12.4 | 110.2 | 9.1 | 12.5 | 19.1 |
| Single modes | 11.1 | 5.4 | 30.8 | 26.2 | 16.7 | 68.4 | 37.3 | 13.8 | 112.9 | 18.8 | 20.2 | 21.9 |
| Truck | 11.5 | 5.3 | 31.6 | 12.6 | 16.0 | 38.7 | 12.2 | 10.5 | 27.0 | 18.4 | 16.9 | 28.9 |
| Rail | S | 27.2 | S | S | 29.9 | S | S | 38.1 | S | 29.5 | 27.9 | 102.1 |
| Water | S | S | S | S | S | S | S | S | S | 29.8 | 31.6 | 47.3 |
| Air (including truck and air) | S | S | S | 37.0 | 45.2 | 168.0 | 42.4 | 42.9 | 193.6 | 13.0 | 8.4 | 20.2 |
| Pipeline | S | S | S | S | S | S | S | S | S | S | S | S |
| Multiple modes | 12.7 | 12.3 | 38.9 | 17.4 | 39.6 | 39.4 | 18.7 | 48.9 | 38.1 | 6.0 | 9.7 | 14.5 |
| Parcel, USPS or courier | 12.8 | 10.5 | 39.1 | 18.1 | 43.1 | 60.0 | 20.3 | S | S | 5.9 | 9.8 | 14.5 |
| Truck and rail | 41.4 | S | S | 42.3 | S | S | 42.5 | S | S | 25.8 | 19.4 | 40.4 |
| Other multiple modes | S | – | S | S | – | S | S | – | S | 31.2 | – | – |
| Other and unknown modes | S | 22.8 | S | S | 36.9 | S | S | 47.0 | S | S | 45.5 | S |
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 | 47.5 | S | S | S | S | S | S | S | S | 21.9 | 35.9 | 111.1 |
| Single modes | 38.0 | S | S | S | S | S | S | S | S | S | 27.7 | S |
| Truck | 38.4 | S | S | 47.1 | S | S | S | S | S | S | 33.5 | S |
| Rail | S | S | S | S | S | S | S | S | S | 36.5 | 31.4 | 11.6 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | – | S | S | – | S | S | – | S | S | – | 24.9 | – |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | S | S | S | S | S | S | S | S | S | 22.9 | 49.1 | 133.1 |
| Parcel, USPS or courier | S | 47.3 | S | S | S | S | S | S | S | 22.9 | S | S |
| 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 | 29.3 | 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.