| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.7%
|
| 1 | Airport | 6 |
4.4%
|
| 2 | Land border crossing | 129 |
94.9%
|
| 3 | Seaport | 0 |
0%
|
| Sysmiss | 218 |