| Types of Vessels | 1999-2002 | Prior to 1999 | None |
|---|---|---|---|
| Tanker | 24% | 43% | 33% |
| Container Ship | 19% | 27% | 54% |
| Roll-on/Roll-off (RoRo) | 17% | 22% | 61% |
| Oil-Gas-Mineral | 10% | 14% | 76% |
| Ocean Towing | 9% | 23% | 68% |
| Bulk | 9% | 23% | 68% |
| Break Bulk | 8% | 41% | 51% |
| Gas Carrier | 4% | 5% | 91% |
| Fishing | 3% | 13% | 84% |
| Other vessels | 26% | 38% | 36% |
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and Maritime Administration, 2002 Mariner Survey, Principal Findings, Washington, DC.