| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Airport | 8 |
6.4%
|
| 2 | Land border crossing | 71 |
56.8%
|
| 3 | Seaport | 46 |
36.8%
|
| Sysmiss | 235 |