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Table 4-2
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| Mode | 1980 | 1990 | 2000 | 2004 |
|---|---|---|---|---|
| Air | ||||
| Air carrier | 3,808 | 6,083 | 8,055 | 8,186 |
| General aviation | 211,045 | 198,000 | 217,533 | 219,426 |
| Highway | ||||
| Automobiles | 121,600,843 | 133,700,496 | 133,621,420 | 136,430,651 |
| Other 2-axle, 4-tire vehiclesa | 27,875,934 | 48,274,555 | 79,084,979 | 91,845,327 |
| Buses (municipally owned transit and commercial, federal, and school buses) | 528,789 | 626,987 | 746,125 | 795,274 |
| Motorcycles | 5,693,940 | 4,259,462 | 4,346,068 | 5,780,870 |
| Trucks | ||||
| Single-unit | 4,373,784 | 4,486,981 | 5,926,030 | 6,161,028 |
| Combination | 1,416,869 | 1,708,895 | 2,096,619 | 2,010,335 |
| Rail-Passenger | ||||
| Amtrak-Cars | 2,128 | 1,863 | 1,894 | 1,211 |
| Amtrak-Locomotives | 419 | 318 | 378 | 276 |
| Commuter railcars and locomotives | 4,500 | 5,007 | 5,498 | P6,228 |
| Transitb | 10,654 | 11,332 | 12,168 | P12,480 |
| Rail-freight | ||||
| Class I-Freight cars | 1,168,114 | 658,902 | 560,154 | 473,773 |
| Class I-Locomotives | 28,094 | 18,835 | 20,028 | 22,015 |
| Other freight cars | 542,713 | 553,359 | 820,642 | 814,147 |
| Waterborne | ||||
| Nonself-propelled vessels (barges)c,d | 31,662 | 31,209 | 33,152 | 31,296 |
| Self-propelled vesselsc,d | 7,126 | 8,236 | 8,202 | 8,994 |
| Oceangoing shipsd (1,000 gross tons and over) | 864 | 636 | 454 | 412 |
| Recreational boats (numbered boats) | 8,577,857 | 10,996,253 | 12,782,143 | 12,781,476 |
a Includes vans, pickup trucks, sport utility vehicles, and other 2-axle, 4-tire motor vehicles that are not passenger cars.
b Includes light and heavy rail transit only.
c See Glossary for definitions.
d U.S.-flag vessels.
Key: P = preliminary
Sources: Except as noted, various sources, as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 1-11, available at http://www.bts.gov, as of October 2006.