| Value | Category | Cases | |
|---|---|---|---|
| -99 | 8 |
4.7%
|
|
| 1 | Not effective at all | 10 |
5.8%
|
| 2 | 9 |
5.2%
|
|
| 3 | 9 |
5.2%
|
|
| 4 | 13 |
7.6%
|
|
| 5 | 15 |
8.7%
|
|
| 6 | 8 |
4.7%
|
|
| 7 | 10 |
5.8%
|
|
| 8 | 20 |
11.6%
|
|
| 9 | 13 |
7.6%
|
|
| 10 | Very effective | 22 |
12.8%
|
| 11 | Don't know | 35 |
20.3%
|
| Sysmiss | 3 |