| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
1.6%
|
| 2 | 11 |
2.5%
|
|
| 3 | 11 |
2.5%
|
|
| 4 | 25 |
5.7%
|
|
| 5 | 35 |
8%
|
|
| 6 | 29 |
6.7%
|
|
| 7 | 35 |
8%
|
|
| 8 | 39 |
9%
|
|
| 9 | 24 |
5.5%
|
|
| 10 | Very effective | 61 |
14%
|
| 11 | Don't know | 158 |
36.3%
|
| Sysmiss | 132 |