| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
7.1%
|
| 2 | 4 |
4.7%
|
|
| 3 | 6 |
7.1%
|
|
| 4 | 11 |
12.9%
|
|
| 5 | 14 |
16.5%
|
|
| 6 | 18 |
21.2%
|
|
| 7 | 6 |
7.1%
|
|
| 8 | 10 |
11.8%
|
|
| 9 | 6 |
7.1%
|
|
| 10 | Very effective | 4 |
4.7%
|
| 11 | Don't know | 108 | |
| Sysmiss | 29 |