| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
2.6%
|
| 2 | 10 |
4.3%
|
|
| 3 | 13 |
5.6%
|
|
| 4 | 29 |
12.4%
|
|
| 5 | 38 |
16.3%
|
|
| 6 | 49 |
21%
|
|
| 7 | 51 |
21.9%
|
|
| 8 | 25 |
10.7%
|
|
| 9 | 10 |
4.3%
|
|
| 10 | Very effective | 2 |
0.9%
|
| 11 | Don't know | 122 | |
| Sysmiss | 11 |