| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1188 |
97.1%
|
| 2 | SOME DIFFICULTY | 32 |
2.6%
|
| 3 | A LOT OF DIFFICULTY | 1 |
0.1%
|
| 4 | CANNOT WALK AT ALL | 2 |
0.2%
|
| 9 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 6770 |