| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
2.5%
|
| 2 | 1 |
1.3%
|
|
| 3 | 7 |
8.8%
|
|
| 4 | 10 |
12.5%
|
|
| 5 | 13 |
16.3%
|
|
| 6 | 13 |
16.3%
|
|
| 7 | 24 |
30%
|
|
| 8 | 8 |
10%
|
|
| 9 | 1 |
1.3%
|
|
| 10 | Very effective | 1 |
1.3%
|
| 11 | Don't know | 36 | |
| Sysmiss | 18 |