| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Airport | 2 |
2.4%
|
| 2 | Land border crossing | 78 |
92.9%
|
| 3 | Seaport or waterway | 4 |
4.8%
|
| Sysmiss | 279 |