| Value | Category | Cases | |
|---|---|---|---|
| 1 | not so useful | 13 |
11.4%
|
| 2 | very useful | 27 |
23.7%
|
| 3 | rather useful | 70 |
61.4%
|
| 4 | not useful at all | 4 |
3.5%
|
| Sysmiss | 213 |