| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.7%
|
| 1 | Airport | 49 |
18%
|
| 2 | Land border crossing | 2 |
0.7%
|
| 3 | Seaport or waterway | 219 |
80.5%
|
| Sysmiss | 1246 |