| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3578 |
56%
|
| 2 | SOME DIFFICULTY | 108 |
1.7%
|
| 3 | A LOT OF DIFFICULTY | 15 |
0.2%
|
| 4 | CANNOT WALK AT ALL | 7 |
0.1%
|
| 9 | NO RESPONSE | 8 |
0.1%
|
| Sysmiss | 2678 |
41.9%
|