| Rank | Variables | Contribution (%) |
| 1 | Liquid Fuels (Li) | 75.37 |
| 2 | Solid Fuels (So) | 18.61 |
| 3 | So ∩ Bu | 2.008 |
| 4 | Ga ∩ Bu | 1.534 |
| 5 | Li ∩ Bu | 0.912 |
| 6 | Bunker Fuels (Bu) | 0.47 |
| 7 | Gas Fuels (Ga) | 0.224 |
| 8 | Li ∩ So | 0.207 |
| 9 | Li ∩ Ga | 0.062 |
| 10 | Li ∩ So ∩ Bu | 0.004 |