| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
3.5%
|
| 1 | Airport | 15 |
7.4%
|
| 2 | Land border crossing | 95 |
47%
|
| 3 | Seaport or waterway | 85 |
42.1%
|
| Sysmiss | 398 |