| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 22795 |
97.2%
|
| 2 | Some difficulty | 552 |
2.4%
|
| 3 | A lot of difficulty | 46 |
0.2%
|
| 4 | Cannot walk at all | 58 |
0.2%
|
| 9 | No response | 6 |
0%
|
| Sysmiss | 18951 |