| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 10 |
3.9%
|
| 2 | 9 |
3.5%
|
|
| 3 | 21 |
8.2%
|
|
| 4 | 24 |
9.4%
|
|
| 5 | 30 |
11.7%
|
|
| 6 | 25 |
9.8%
|
|
| 7 | 30 |
11.7%
|
|
| 8 | 23 |
9%
|
|
| 9 | 22 |
8.6%
|
|
| 10 | Very effective | 14 |
5.5%
|
| 11 | Don't know | 48 |
18.8%
|
| Sysmiss | 4 |