| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 9 |
3.5%
|
| 2 | 10 |
3.9%
|
|
| 3 | 18 |
6.9%
|
|
| 4 | 27 |
10.4%
|
|
| 5 | 61 |
23.6%
|
|
| 6 | 40 |
15.4%
|
|
| 7 | 38 |
14.7%
|
|
| 8 | 24 |
9.3%
|
|
| 9 | 10 |
3.9%
|
|
| 10 | Very effective | 22 |
8.5%
|
| 11 | Don't know | 47 | |
| Sysmiss | 90 |