| Value | Category |
|---|---|
| 1 | Border crossing procedures, visa registration and local regi |
| 2 | Corruption of border, immigrations or customs staff at borde |
| 3 | Infringement of dignity by staff |
| 4 | Expensiveness or unavailability of air tickets |
| 97 | Had no problems |
| 99 | DO NOT KNOW/NO RESPONSE |
| Sysmiss |