| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.3%
|
| 2 | 2 |
1.5%
|
|
| 3 | 10 |
7.6%
|
|
| 4 | 10 |
7.6%
|
|
| 5 | 18 |
13.7%
|
|
| 6 | 22 |
16.8%
|
|
| 7 | 21 |
16%
|
|
| 8 | 30 |
22.9%
|
|
| 9 | 13 |
9.9%
|
|
| 10 | Very effective | 2 |
1.5%
|
| 11 | Don't know | 109 | |
| Sysmiss | 29 |