| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 9 |
8.8%
|
| 2 | 4 |
3.9%
|
|
| 3 | 2 |
2%
|
|
| 4 | 3 |
2.9%
|
|
| 5 | 6 |
5.9%
|
|
| 6 | 8 |
7.8%
|
|
| 7 | 14 |
13.7%
|
|
| 8 | 9 |
8.8%
|
|
| 9 | 17 |
16.7%
|
|
| 10 | Very effective | 30 |
29.4%
|
| 11 | Don't know | 51 | |
| Sysmiss | 27 |