| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1 |
0%
|
| 2 | SOME DIFFICULTY | 1 |
0%
|
| 3 | A LOT OF DIFFICULTY | 6 |
0.2%
|
| 4 | CANNOT WALK 100 M/Y AT ALL | 9 |
0.2%
|
| Sysmiss | 3759 |
99.5%
|