| Value | Category | Cases | |
|---|---|---|---|
| 1 | Bad weather | 38 |
16.9%
|
| 2 | Lack of equipment | 18 |
8%
|
| 3 | Poor maintenance | 116 |
51.6%
|
| 4 | Lack of engineers | 1 |
0.4%
|
| 96 | Other | 52 |
23.1%
|
| Sysmiss | 1328 |