The U.S. Bureau of Transportation Statistics released the National Transportation Statistics 2002
In the maritime sector, the report notes that the number of U.S.-flag ocean-going vessels of 1,000 gross tons and over decreased from 2,926 in 1960 to 443 in 2001. The U.S. ocean-going tonnage decreased from 32,567,000 dwt to 14,978,000 dwt during this same period. Average vessel size rose from 11,130 dwt to 33,810 dwt.
Source: HK Law