| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Airport | 1 |
2.9%
|
| 2 | Land border crossing | 28 |
80%
|
| 3 | Seaport | 6 |
17.1%
|
| Sysmiss | 116 |