| Value | Category | Cases | |
|---|---|---|---|
| 1 | Bad weather | 23 | 
                                    
                                    12.1%
                                 | 
| 2 | Lack of equipment | 2 | 
                                    
                                    1.1%
                                 | 
| 3 | Poor maintenance | 125 | 
                                    
                                    65.8%
                                 | 
| 4 | Lack of engineers | 0 | 
                                    
                                    0%
                                 | 
| 96 | Other | 40 | 
                                    
                                    21.1%
                                 | 
| Sysmiss | 565 |