| Value | Category | Cases | |
|---|---|---|---|
| 1 | Bad weather | 33 |
24.8%
|
| 2 | Lack of equipment | 9 |
6.8%
|
| 3 | Poor maintenance | 78 |
58.6%
|
| 4 | Lack of engineers | 1 |
0.8%
|
| 8 | Other | 12 |
9%
|
| Sysmiss | 1402 |