| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 15 |
0.5%
|
| 3 | A LOT OF DIFFICULTY | 1 |
0%
|
| 4 | CANNOT WALK AT ALL | 2 |
0.1%
|
| Sysmiss | 2806 |
99.4%
|