| Value | Category | Cases | |
|---|---|---|---|
| 1 | BP | 1121 | 
                                    
                                    14.2%
                                 | 
| 2 | Caltex | 1363 | 
                                    
                                    17.3%
                                 | 
| 3 | Engen | 2728 | 
                                    
                                    34.6%
                                 | 
| 4 | Exel | 54 | 
                                    
                                    0.7%
                                 | 
| 5 | Sasol | 806 | 
                                    
                                    10.2%
                                 | 
| 6 | Shell | 1086 | 
                                    
                                    13.8%
                                 | 
| 7 | Total | 496 | 
                                    
                                    6.3%
                                 | 
| 8 | Other | 178 | 
                                    
                                    2.3%
                                 | 
| 9 | Do not know | 60 | 
                                    
                                    0.8%
                                 | 
| Sysmiss | 17692 |