| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.8%
|
| 1 | Airport | 7 |
12.7%
|
| 2 | Land border crossing | 0 |
0%
|
| 3 | Seaport | 47 |
85.5%
|
| Sysmiss | 48 |