| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
3.9%
|
| 2 | 6 |
5.9%
|
|
| 3 | 5 |
4.9%
|
|
| 4 | 3 |
2.9%
|
|
| 5 | 12 |
11.8%
|
|
| 6 | 6 |
5.9%
|
|
| 7 | 13 |
12.7%
|
|
| 8 | 10 |
9.8%
|
|
| 9 | 3 |
2.9%
|
|
| 10 | Very effective | 2 |
2%
|
| 11 | Don't know | 38 |
37.3%
|
| Sysmiss | 10 |