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 | 3.6 | 3.4 | 6.1 | 12.4 | 11.1 | 16.4 | 7.1 | 6.6 | 10.9 | 9.2 | 6.4 | 13.1 |
| Single modes | 4.3 | 4.2 | 7.6 | 12.1 | 11.1 | 16.1 | 7.5 | 4.8 | 10.5 | 9.4 | 5.5 | 10.1 |
| Truck | 4.7 | 4.3 | 8.1 | 12.6 | 12.5 | 17.7 | 9.4 | 6.5 | 14.3 | 9.0 | 5.9 | 10.6 |
| Rail | 17.3 | 22.3 | 23.1 | 15.7 | 8.9 | 18.4 | 15.1 | 5.9 | 15.8 | 8.6 | 9.6 | 15.4 |
| Water | S | – | S | S | – | S | S | – | S | 32.1 | – | – |
| Air (including truck and air) | S | 28.7 | S | 42.6 | 22.3 | 48.8 | 43.2 | 27.6 | 63.6 | 17.9 | 5.0 | 25.8 |
| Pipeline | 46.2 | 28.9 | 14.5 | 46.7 | 34.2 | 1.1 | S | S | S | S | S | S |
| Multiple modes | 13.6 | 5.4 | 13.4 | 27.7 | 34.0 | 21.9 | 16.1 | 49.6 | 23.7 | 7.2 | 7.4 | 13.0 |
| Parcel, USPS or courier | 14.6 | 6.5 | 15.0 | 11.4 | 15.6 | 14.8 | 11.0 | 12.3 | 13.8 | 7.2 | 7.4 | 13.0 |
| Truck and rail | 29.4 | 33.2 | 21.7 | 47.6 | 47.1 | 26.6 | 27.9 | S | S | 14.1 | 12.5 | 23.4 |
| Other multiple modes | 42.7 | S | S | S | S | S | 48.5 | S | S | S | 36.5 | S |
| Other and unknown modes | 21.4 | 9.5 | 26.9 | 47.2 | 20.4 | 81.8 | 20.0 | 41.7 | 21.4 | 39.6 | S | 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 | 18.5 | 5.8 | 29.0 | 24.0 | 10.7 | 27.8 | 14.8 | 8.8 | 25.1 | 10.1 | 46.8 | 313.0 |
| Single modes | 18.9 | 6.0 | 30.0 | 24.8 | 10.5 | 29.8 | 15.2 | 9.2 | 26.7 | 35.7 | 46.8 | 153.2 |
| Truck | 19.2 | 6.6 | 31.2 | 26.0 | 11.3 | 31.1 | 14.2 | 12.0 | 27.9 | 35.6 | 47.1 | 154.2 |
| Rail | 43.1 | 33.8 | 25.8 | S | 33.6 | S | S | 37.0 | S | 26.3 | 14.0 | 29.2 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | S | S | S | S | S | S | S | S | S | 31.6 | 31.6 | 4.2 |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | 36.4 | 49.6 | 374.3 | 45.4 | S | S | S | S | S | 12.8 | 31.2 | 63.1 |
| Parcel, USPS or courier | 44.4 | 39.0 | S | 39.0 | 47.4 | S | 39.2 | 39.0 | S | 10.6 | 48.3 | 127.0 |
| Truck and rail | S | S | S | S | S | S | S | S | S | 31.6 | 27.6 | 134.1 |
| Other multiple modes | – | – | – | – | – | – | – | – | – | – | – | – |
| Other and unknown modes | S | 40.8 | S | S | S | S | S | 28.2 | S | 35.4 | 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 | 14.7 | 11.1 | 24.8 | 13.4 | 22.8 | 28.5 | 13.0 | 21.3 | 33.8 | 32.0 | 17.1 | 70.1 |
| Single modes | 14.8 | 11.2 | 25.2 | 13.5 | 22.8 | 28.9 | 13.2 | 21.3 | 34.7 | 36.1 | 14.2 | 30.8 |
| Truck | 15.2 | 11.4 | 26.1 | 13.8 | 23.9 | 30.5 | 13.9 | 23.1 | 39.0 | 36.3 | 14.2 | 30.8 |
| Rail | 44.1 | 45.8 | 38.9 | 35.2 | 44.7 | 35.5 | 38.4 | 46.5 | 38.1 | 24.6 | 24.0 | 38.0 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | – | S | S | – | S | S | – | S | S | – | 30.0 | – |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | 44.9 | 43.6 | 55.7 | S | S | S | S | 49.5 | S | 21.9 | 22.4 | 36.9 |
| Parcel, USPS or courier | 46.2 | 49.0 | 89.6 | 45.2 | S | S | 48.5 | S | S | 21.9 | 23.9 | 37.9 |
| Truck and rail | S | 48.5 | S | S | S | S | S | 47.3 | S | 31.6 | 49.8 | 535.1 |
| Other multiple modes | S | S | S | S | S | S | S | S | S | 31.6 | 31.6 | 0.4 |
| Other and unknown modes | S | 34.6 | S | S | 40.4 | S | S | 47.9 | S | 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 | 25.3 | 11.1 | 32.3 | 28.5 | 25.1 | 33.4 | 20.2 | 10.1 | 26.5 | 39.6 | 33.3 | 87.1 |
| Single modes | 25.5 | 11.5 | 33.9 | 27.0 | 25.6 | 31.9 | 20.2 | 8.8 | 28.5 | 37.7 | 31.5 | 89.7 |
| Truck | 33.2 | 16.4 | 49.6 | 30.3 | 29.5 | 37.5 | 22.4 | 11.1 | 48.1 | 40.2 | 33.4 | 119.2 |
| Rail | 15.3 | 9.9 | 18.7 | 27.2 | 13.7 | 32.4 | 27.5 | 11.7 | 28.8 | 11.1 | 11.8 | 15.7 |
| Water | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
| Air (including truck and air) | – | S | S | – | S | S | – | S | S | – | 29.8 | – |
| Pipeline | 45.5 | 28.9 | 13.4 | 42.5 | 34.2 | 0.9 | S | S | S | S | S | S |
| Multiple modes | S | S | S | S | S | S | S | S | S | 31.6 | 21.3 | 39.1 |
| Parcel, USPS or courier | – | S | S | – | 34.0 | – | – | S | S | – | 29.6 | – |
| Truck and rail | S | S | S | S | S | S | S | S | S | 31.6 | 28.0 | 39.3 |
| Other multiple modes | – | – | – | – | – | – | – | – | – | – | – | – |
| Other and unknown modes | S | 33.7 | S | S | S | S | S | 34.2 | S | S | 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 | 19.7 | 37.7 | 41.1 | 32.3 | 42.5 | 55.9 | 38.4 | 41.2 | 24.9 | 19.3 | 13.9 | 10.0 |
| Single modes | 19.7 | 37.9 | 41.4 | 32.3 | 42.8 | 56.5 | 38.4 | 41.7 | 25.3 | 19.4 | 8.1 | 9.9 |
| Truck | 19.7 | 38.0 | 40.9 | 33.1 | 42.9 | 55.1 | 34.0 | 42.4 | 16.9 | 19.6 | 8.1 | 9.8 |
| Rail | S | 31.0 | S | S | 36.7 | S | S | 36.2 | S | 28.2 | 28.9 | 28.4 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | – | S | S | – | S | S | – | S | S | – | 31.6 | – |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | S | 48.9 | S | S | S | S | S | S | S | 31.6 | 20.5 | 1.6 |
| Parcel, USPS or courier | S | 40.2 | S | S | 42.0 | S | S | S | S | 31.6 | 20.2 | 1.6 |
| Truck and rail | – | S | S | – | S | S | – | S | S | – | 29.9 | – |
| Other multiple modes | – | – | – | – | – | – | – | – | – | – | – | – |
| Other and unknown modes | S | S | S | S | S | S | S | S | S | 29.8 | 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 | 14.3 | 6.5 | 21.4 | 11.8 | 10.1 | 13.4 | 15.0 | 8.3 | 17.1 | 12.7 | 14.4 | 17.9 |
| Single modes | 15.1 | 6.6 | 23.8 | 12.4 | 10.5 | 14.0 | 15.8 | 8.0 | 17.7 | 19.4 | 12.1 | 21.4 |
| Truck | 15.7 | 6.8 | 25.0 | 13.5 | 9.9 | 13.7 | 19.6 | 7.9 | 21.4 | 19.6 | 12.8 | 22.5 |
| Rail | 36.1 | 11.0 | 47.9 | 40.9 | 21.6 | 59.4 | 21.9 | 13.3 | 24.5 | 29.8 | 19.0 | 35.6 |
| Water | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
| Air (including truck and air) | S | S | S | S | 45.2 | S | S | 48.0 | S | 22.4 | 13.1 | 20.1 |
| Pipeline | S | – | S | S | – | S | S | S | S | S | S | S |
| Multiple modes | 22.2 | 14.7 | 22.2 | S | 16.7 | S | 49.4 | 26.9 | 45.9 | 11.1 | 10.7 | 13.1 |
| Parcel, USPS or courier | 21.7 | 15.4 | 22.1 | 27.0 | 15.2 | 35.2 | 17.3 | 19.2 | 22.0 | 10.9 | 10.8 | 12.8 |
| Truck and rail | S | 38.3 | S | S | 36.0 | S | S | 37.0 | S | 39.6 | 16.3 | 17.9 |
| Other multiple modes | S | S | S | S | S | S | S | S | S | 25.8 | 41.0 | 109.2 |
| Other and unknown modes | S | 32.9 | S | S | 49.5 | S | 49.8 | 42.6 | 109.7 | 24.0 | 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 | 12.4 | 4.7 | 15.4 | 9.4 | 10.6 | 18.1 | 8.3 | 9.6 | 14.6 | 9.2 | 7.7 | 14.3 |
| Single modes | 11.1 | 4.6 | 13.6 | 8.7 | 10.5 | 16.9 | 8.0 | 9.4 | 14.2 | 10.1 | 3.5 | 9.2 |
| Truck | 11.7 | 5.0 | 14.2 | 9.4 | 11.5 | 19.6 | 10.3 | 8.9 | 16.7 | 10.4 | 3.3 | 8.9 |
| Rail | 11.1 | 15.6 | 17.8 | 14.0 | 19.1 | 19.0 | 17.7 | 17.4 | 22.9 | 8.6 | 7.8 | 12.3 |
| Water | S | – | S | S | – | S | S | – | S | 30.7 | – | – |
| Air (including truck and air) | S | 36.6 | S | S | 34.8 | S | S | 29.7 | S | 22.7 | 8.2 | 24.8 |
| Pipeline | S | – | S | S | – | S | S | S | S | S | S | S |
| Multiple modes | 11.0 | 15.1 | 20.9 | S | 31.5 | S | 36.1 | S | S | 9.7 | 7.5 | 14.6 |
| Parcel, USPS or courier | 13.3 | 9.7 | 19.8 | 10.6 | 13.4 | 18.1 | 13.2 | 29.8 | 27.6 | 9.7 | 7.5 | 14.6 |
| Truck and rail | 43.9 | S | S | S | S | S | 46.4 | S | S | 22.2 | 18.5 | 25.5 |
| Other multiple modes | S | S | S | S | S | S | S | S | S | 29.5 | 43.0 | 136.7 |
| Other and unknown modes | S | 17.3 | S | S | 20.9 | S | 44.2 | 15.1 | 64.7 | 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 | 14.6 | 7.6 | 18.3 | 19.9 | 23.8 | 27.2 | 29.1 | 12.4 | 44.1 | 11.8 | 13.1 | 16.5 |
| Single modes | 15.8 | 8.2 | 21.4 | 20.1 | 24.9 | 29.3 | 29.6 | 10.6 | 52.6 | 20.9 | 26.0 | 33.3 |
| Truck | 16.0 | 8.7 | 22.2 | 20.1 | 23.8 | 28.5 | 31.9 | 8.9 | 56.5 | 21.9 | 26.9 | 37.0 |
| Rail | S | 37.5 | S | S | S | S | 42.6 | 32.1 | 76.7 | 29.7 | 45.4 | 61.8 |
| Water | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
| Air (including truck and air) | 33.4 | S | S | 33.0 | S | S | 31.3 | S | S | 16.7 | 10.1 | 20.6 |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | 30.1 | 18.6 | 26.6 | 38.6 | 43.3 | 15.0 | S | 21.5 | S | 14.7 | 12.4 | 21.5 |
| Parcel, USPS or courier | 31.0 | 20.0 | 29.2 | 36.6 | 30.8 | 40.3 | 37.5 | 18.4 | 38.3 | 14.6 | 12.4 | 21.4 |
| Truck and rail | S | 33.4 | S | S | S | S | S | 33.0 | S | 28.7 | 42.3 | 136.9 |
| Other multiple modes | S | S | S | S | S | S | S | S | S | S | 31.6 | S |
| Other and unknown modes | S | 18.9 | S | 34.5 | S | S | 47.0 | S | S | S | 37.0 | 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 | 14.3 | 6.7 | 14.0 | 18.3 | 13.0 | 23.3 | 18.6 | 13.4 | 17.7 | 10.3 | 13.0 | 21.6 |
| Single modes | 17.4 | 9.3 | 18.5 | 19.2 | 13.5 | 25.7 | 20.1 | 14.1 | 18.5 | 22.0 | 20.2 | 32.6 |
| Truck | 16.9 | 12.9 | 19.1 | 21.6 | 16.4 | 34.0 | 20.2 | 18.3 | 23.2 | 26.1 | 20.6 | 42.9 |
| Rail | 40.5 | 35.1 | 36.0 | 49.3 | 14.9 | 21.2 | 46.8 | 17.6 | 22.4 | 25.0 | 6.7 | 27.9 |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | S | 34.3 | S | S | 33.3 | S | S | 40.4 | S | 8.7 | 6.4 | 15.1 |
| Pipeline | S | – | S | S | – | S | S | S | S | S | S | S |
| Multiple modes | 30.3 | 13.2 | 23.6 | 28.0 | 16.3 | 15.4 | 25.4 | 13.5 | 22.0 | 8.6 | 9.9 | 17.8 |
| Parcel, USPS or courier | 30.5 | 13.4 | 24.1 | 31.1 | 18.3 | 17.9 | 27.1 | 12.8 | 17.5 | 8.6 | 9.9 | 17.7 |
| Truck and rail | S | 38.7 | S | S | 45.5 | S | S | 40.9 | S | 29.8 | 26.0 | 104.8 |
| Other multiple modes | S | – | S | S | – | S | S | – | S | 28.1 | – | – |
| Other and unknown modes | 25.8 | 23.3 | 30.7 | 26.5 | 35.2 | 27.3 | 34.5 | 33.1 | 54.7 | S | S | 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 | 12.6 | 17.3 | 41.3 | 18.1 | 13.4 | 19.8 | 8.3 | 18.2 | 12.9 | 17.3 | 9.5 | 23.5 |
| Single modes | 13.7 | 19.5 | 46.4 | 16.2 | 14.3 | 19.3 | 8.5 | 20.3 | 14.7 | 28.9 | 9.1 | 28.6 |
| Truck | 14.1 | 19.8 | 47.1 | 17.3 | 15.2 | 21.2 | 9.9 | 21.6 | 16.6 | 26.4 | 9.4 | 25.2 |
| Rail | S | 37.9 | S | S | 34.2 | S | S | 24.7 | S | 28.4 | S | S |
| Water | – | – | – | – | – | – | – | – | – | – | – | – |
| Air (including truck and air) | S | 28.0 | S | S | 49.5 | S | 47.3 | 33.5 | 20.9 | 22.0 | 8.7 | 50.0 |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | 17.0 | 29.1 | 63.0 | 20.1 | S | S | 33.1 | 32.2 | 36.1 | 11.1 | 17.8 | 32.0 |
| Parcel, USPS or courier | 16.5 | 28.8 | 64.9 | 15.7 | S | S | 24.1 | S | S | 11.1 | 17.8 | 32.0 |
| Truck and rail | S | 38.4 | S | S | 37.2 | S | S | 35.2 | S | 31.6 | 25.0 | 54.4 |
| Other multiple modes | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
| Other and unknown modes | 29.8 | 17.2 | 52.1 | S | 42.8 | S | 46.5 | 39.5 | 11.4 | S | 46.5 | 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 | 42.1 | 26.7 | 36.1 | S | 43.3 | S | S | 38.1 | S | 18.9 | 22.8 | 40.1 |
| Single modes | 43.6 | 32.2 | 44.5 | S | 37.2 | S | S | 34.8 | S | 29.0 | 31.3 | 59.0 |
| Truck | 30.8 | 32.3 | 27.9 | S | 37.2 | S | S | 34.8 | S | 29.2 | 32.6 | 62.8 |
| Rail | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
| Water | S | – | S | S | – | S | S | – | S | 31.6 | – | – |
| Air (including truck and air) | – | S | S | – | S | S | – | S | S | – | 30.2 | – |
| Pipeline | – | – | – | – | – | – | S | S | S | S | S | S |
| Multiple modes | S | 46.8 | S | S | S | S | S | 48.4 | S | 26.6 | 22.1 | 38.8 |
| Parcel, USPS or courier | S | S | S | S | S | S | 42.3 | S | S | 27.8 | 23.9 | 41.1 |
| Truck and rail | S | S | S | S | S | S | S | S | S | 31.6 | 43.0 | 47.8 |
| Other multiple modes | – | – | – | – | – | – | – | – | – | – | – | – |
| Other and unknown modes | – | S | S | – | S | S | – | S | S | – | 31.9 | – |
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.