| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3982 |
72.7%
|
| 2 | SOME DIFFICULTY | 298 |
5.4%
|
| 3 | A LOT OF DIFFICULTY | 27 |
0.5%
|
| 4 | CANNOT WALK/CLIMB STEPS AT ALL | 2 |
0%
|
| Sysmiss | 1167 |
21.3%
|