| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 6892 |
96.3%
|
| 2 | SOME DIFFICULTY | 104 |
1.5%
|
| 3 | A LOT OF DIFFICULTY | 10 |
0.1%
|
| 4 | CANNOT WALK 100 M M/Y AT ALL | 3 |
0%
|
| Sysmiss | 146 |
2%
|