| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3236 |
69.2%
|
| 2 | SOME DIFFICULTY | 183 |
3.9%
|
| 3 | A LOT OF DIFFICULTY | 22 |
0.5%
|
| 4 | CANNOT WALK/CLIMB STEPS AT ALL | 1 |
0%
|
| Sysmiss | 1235 |
26.4%
|