| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 15250 |
91.8%
|
| 2 | SOME DIFFICULTY | 1219 |
7.3%
|
| 3 | A LOT OF DIFFICULTY | 104 |
0.6%
|
| 4 | CANNOT WALK AT ALL | 30 |
0.2%
|
| 9 | NO RESPONSE | 3 |
0%
|
| Sysmiss | 9032 |