| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Airport | 2 |
1.8%
|
| 2 | Land border crossing | 21 |
18.6%
|
| 3 | Seaport | 90 |
79.6%
|
| Sysmiss | 485 |