| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 17242 |
87.5%
|
| 2 | SOME DIFFICULTY | 2040 |
10.4%
|
| 3 | A LOT OF DIFFICULTY | 316 |
1.6%
|
| 4 | CANNOT WALK AT ALL | 92 |
0.5%
|
| 9 | NO RESPONSE | 4 |
0%
|
| Sysmiss | 13704 |