| Value | Category | Cases | |
|---|---|---|---|
| 1 | Well | 25 |
3.7%
|
| 2 | Fairly well | 127 |
18.7%
|
| 3 | Fairly | 224 |
32.9%
|
| 4 | With difficulty | 304 |
44.7%
|
| Sysmiss | 667 |