| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2237 |
63.1%
|
| 2 | SOME DIFFICULTY | 21 |
0.6%
|
| 4 | CANNOT WALK AT ALL | 2 |
0.1%
|
| Sysmiss | 1284 |
36.2%
|