| 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 |