| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.9%
|
| 3 | 4 |
7.7%
|
|
| 4 | 6 |
11.5%
|
|
| 5 | 9 |
17.3%
|
|
| 6 | 13 |
25%
|
|
| 7 | 8 |
15.4%
|
|
| 8 | 7 |
13.5%
|
|
| 9 | 1 |
1.9%
|
|
| 10 | Very effective | 3 |
5.8%
|
| 11 | Don't know | 49 | |
| Sysmiss | 3 |