| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
3.2%
|
| 1 | Airport | 1 |
1.6%
|
| 2 | Land border crossing | 59 |
95.2%
|
| 3 | Seaport or waterway | 0 |
0%
|
| Sysmiss | 302 |