| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 10146 |
69.5%
|
| 2 | SOME DIFFICULTY | 1987 |
13.6%
|
| 3 | A LOT OF DIFFICULTY | 383 |
2.6%
|
| 4 | CANNOT WALK/CLIMB STEPS AT ALL | 12 |
0.1%
|
| Sysmiss | 2081 |
14.2%
|