| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 21623 |
97.3%
|
| 2 | SOME DIFFICULTY | 513 |
2.3%
|
| 3 | A LOT OF DIFFICULTY | 60 |
0.3%
|
| 4 | CANNOT WALK 100 M/Y AT ALL | 15 |
0.1%
|
| 9 | NO RESPONSE | 4 |
0%
|
| Sysmiss | 491 |