| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
3.5%
|
| 2 | 2 |
1%
|
|
| 3 | 14 |
7.1%
|
|
| 4 | 12 |
6.1%
|
|
| 5 | 35 |
17.7%
|
|
| 6 | 29 |
14.6%
|
|
| 7 | 26 |
13.1%
|
|
| 8 | 43 |
21.7%
|
|
| 9 | 17 |
8.6%
|
|
| 10 | Very effective | 13 |
6.6%
|
| 11 | Don't know | 20 | |
| Sysmiss | 4 |