| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
4.3%
|
| 1 | Airport | 3 |
2.6%
|
| 2 | Land border crossing | 37 |
31.6%
|
| 3 | Seaport | 72 |
61.5%
|
| Sysmiss | 243 |