| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3602 |
56.9%
|
| 2 | SOME DIFFICULTY | 49 |
0.8%
|
| 3 | A LOT OF DIFFICULTY | 9 |
0.1%
|
| 4 | CANNOT WALK AT ALL | 11 |
0.2%
|
| 9 | NO RESPONSE | 9 |
0.1%
|
| Sysmiss | 2648 |