| Value | Category | Cases | |
|---|---|---|---|
| 1 | rather useful | 11 |
14.1%
|
| 2 | very useful | 63 |
80.8%
|
| 3 | not very useful | 3 |
3.8%
|
| 4 | not useful at all | 1 |
1.3%
|
| Sysmiss | 438 |