| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
2.9%
|
| 2 | 7 |
5%
|
|
| 3 | 2 |
1.4%
|
|
| 4 | 3 |
2.1%
|
|
| 5 | 8 |
5.7%
|
|
| 6 | 19 |
13.6%
|
|
| 7 | 19 |
13.6%
|
|
| 8 | 18 |
12.9%
|
|
| 9 | 7 |
5%
|
|
| 10 | Very effective | 3 |
2.1%
|
| 11 | Don't know | 50 |
35.7%
|
| Sysmiss | 9 |