| Value | Category | Cases | |
|---|---|---|---|
| 1 | no difficulty | 293 |
5.4%
|
| 2 | mild difficulty | 529 |
9.7%
|
| 3 | moderate | 387 |
7.1%
|
| 4 | severe | 140 |
2.6%
|
| 5 | extreme/cannot do anything | 34 |
0.6%
|
| 7 | 1 |
0%
|
|
| 9 | 4085 |
74.7%
|
|
| Sysmiss | 1 |