| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
3.8%
|
| 2 | 4 |
7.5%
|
|
| 3 | 6 |
11.3%
|
|
| 4 | 11 |
20.8%
|
|
| 5 | 10 |
18.9%
|
|
| 6 | 7 |
13.2%
|
|
| 7 | 8 |
15.1%
|
|
| 8 | 4 |
7.5%
|
|
| 10 | Very effective | 1 |
1.9%
|
| 11 | Don't know | 62 | |
| Sysmiss | 19 |