| Ship’s age-years | $ per GRT―Tax in 1953/& 2007 | ||
| 0 - 4 | (suggestion 0 - 4.99) | 0.53 | 1.208 (*) |
| 5 - 9 | (suggestion 5 - 9.99) | 0.95 | 2.166 |
| 10 - 19 | (suggestion 10 - 19.99) | 0.93 | 2.120 |
| 20 - 29 | (suggestion 20 - 29.99) | 0.88 | 2.006 |
| 30 | and over | 0.68 | 1.550 |