| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
3.9%
|
| 1 | Airport | 27 |
21.1%
|
| 2 | Land border crossing | 5 |
3.9%
|
| 3 | Seaport | 91 |
71.1%
|
| Sysmiss | 1172 |