| Value | Category | Cases | |
|---|---|---|---|
| 1 | BP | 1441 |
19.3%
|
| 2 | Caltex | 1202 |
16.1%
|
| 3 | Engen | 2372 |
31.8%
|
| 4 | Exel | 94 |
1.3%
|
| 5 | Sasol | 548 |
7.3%
|
| 6 | Shell | 1152 |
15.4%
|
| 7 | Total | 482 |
6.5%
|
| 8 | Other | 135 |
1.8%
|
| 9 | Do not know | 39 |
0.5%
|
| Sysmiss | 17643 |