| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.5%
|
| 1 | Airport | 7 |
5.4%
|
| 2 | Land border crossing | 77 |
59.2%
|
| 3 | Seaport | 44 |
33.8%
|
| Sysmiss | 221 |