| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.4%
|
| 1 | Airport | 10 |
3.9%
|
| 2 | Land border crossing | 239 |
93.4%
|
| 3 | Seaport | 6 |
2.3%
|
| Sysmiss | 575 |