| Value | Category | Cases | |
|---|---|---|---|
| 1 | Missing documentation | 1 |
10%
|
| 2 | Implies a very expensive trip | 0 |
0%
|
| 3 | Waiting | 4 |
40%
|
| 4 | Other | 0 |
0%
|
| 5 | Don't know | 2 |
20%
|
| 99 | N/R | 3 |
30%
|
| 999 | N/A | 0 |
0%
|
| Sysmiss | 1189 |