| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 5219 |
58.6%
|
| 2 | SOME DIFFICULTY | 104 |
1.2%
|
| 3 | A LOT OF DIFFICULTY | 8 |
0.1%
|
| 4 | CANNOT WALK AT ALL | 2 |
0%
|
| Sysmiss | 3570 |
40.1%
|