| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3888 |
57.6%
|
| 2 | SOME DIFFICULTY | 106 |
1.6%
|
| 3 | A LOT OF DIFFICULTY | 5 |
0.1%
|
| 4 | CANNOT WALK AT ALL | 9 |
0.1%
|
| Sysmiss | 2741 |
40.6%
|