| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 10 |
0.3%
|
| 2 | SOME DIFFICULTY | 1 |
0%
|
| 3 | A LOT OF DIFFICULTY | 1 |
0%
|
| 4 | CANNOT WALK AT ALL | 2 |
0.1%
|
| Sysmiss | 3530 |
99.6%
|