| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.5%
|
| 1 | Airport | 9 |
4.9%
|
| 2 | Land border crossing | 104 |
56.2%
|
| 3 | Seaport | 71 |
38.4%
|
| Sysmiss | 415 |