| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Airport | 0 |
0%
|
| 2 | Land border crossing | 10 |
71.4%
|
| 3 | Seaport | 4 |
28.6%
|
| Sysmiss | 136 |