| Value | Category | Cases | |
|---|---|---|---|
| 1 | no difficulty | 1603 |
28.7%
|
| 2 | mild difficulty | 1945 |
34.8%
|
| 3 | moderate | 1354 |
24.2%
|
| 4 | severe | 554 |
9.9%
|
| 5 | extreme/cannot do anything | 129 |
2.3%
|
| Sysmiss | 306 |