| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1%
|
| 1 | Airport | 3 |
1.5%
|
| 2 | Land border crossing | 181 |
91.4%
|
| 3 | Seaport | 12 |
6.1%
|
| Sysmiss | 768 |