| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 1 | Airport | 16 |
13.2%
|
| 2 | Land border crossing | 9 |
7.4%
|
| 3 | Seaport | 95 |
78.5%
|
| Sysmiss | 592 |