| Value | Category | Cases | |
|---|---|---|---|
| 1 | Poor ventilation | 433 |
16.6%
|
| 2 | Seat uncomfortable | 855 |
32.7%
|
| 3 | Leaking roof | 56 |
2.1%
|
| 4 | Smoking engines | 100 |
3.8%
|
| 5 | Overloading | 1139 |
43.6%
|
| 9 | 32 |
1.2%
|
|
| 96 | Other | 0 |
0%
|
| Sysmiss | 20623 |