| Value |
Category |
| 1 |
Road |
| 2 |
Rail |
| 3 |
Air |
| 4 |
Sea |
| 5 |
Lake |
| 6 |
Not applicable |
| 99 |
No other alternative |
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.