| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 1 | Airport | 1 |
0.8%
|
| 2 | Land border crossing | 110 |
84.6%
|
| 3 | Seaport | 18 |
13.8%
|
| Sysmiss | 344 |