| Value | Category | Cases | |
|---|---|---|---|
| 1 | Road | 0 |
0%
|
| 2 | Rail | 0 |
0%
|
| 3 | Air | 1 |
33.3%
|
| 4 | Sea | 0 |
0%
|
| 5 | Lake | 0 |
0%
|
| 6 | Not applicable | 0 |
0%
|
| 99 | No other alternative | 2 |
66.7%
|
| Sysmiss | 834 |