|Age group (years)|
|Vessel types||< 6||6-10||11-15||16-20||21-25||> 25|
NOTES: Total excludes a small number of boats whose ages are unkown. Data includes vessels available for operation. Age is based on the year vessels were built or rebuilt. Passenger includes passenger excursion/sightseeing, combination passenger and dry-cargo vessels, and ferries.
SOURCE: U.S. Army Corps of Engineers, Waterborne Transportation Lines of the United States, Volume 1, National Summaries, Table 4 (New Orleans, LA: annual issues) as reported in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 1-31, available at http://www.bts.gov/publications/national_transportation_statistics/ as of October 2008.