| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Airport | 10 |
5.4%
|
| 2 | Land border crossing | 144 |
77.4%
|
| 3 | Seaport | 32 |
17.2%
|
| Sysmiss | 821 |