| Value | Category | Cases | |
|---|---|---|---|
| -1 | Refused | 3 |
3.2%
|
| 1 | Very useful | 61 |
65.6%
|
| 2 | Somewhat useful | 25 |
26.9%
|
| 3 | Not useful | 4 |
4.3%
|
| Sysmiss | 107 |