| Value | Category | Cases | |
|---|---|---|---|
| 1 | adjacent | 0 |
0%
|
| 2 | less than 30 minutes | 1 |
100%
|
| 3 | between 30 minutes and 1 hour | 0 |
0%
|
| 4 | one to three hours walking | 0 |
0%
|
| 5 | more than 3 hours | 0 |
0%
|
| Sysmiss | 2154 |