| Cost | Survey | ||
| Mean Rank | Std. Dev | N | |
| Depreciation | 1.53 | 1.21 | 980 |
| Fuel cost | 2.94 | 1.46 | 980 |
| Service and maintenance | 3.74 | 1.42 | 980 |
| Insurance | 3.85 | 1.17 | 980 |
| Interest cost | 4.11 | 1.62 | 980 |
| Taxes | 4.82 | 1.99 | 980 |