| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.5%
|
| 2 | 6 |
3%
|
|
| 3 | 15 |
7.5%
|
|
| 4 | 17 |
8.5%
|
|
| 5 | 25 |
12.6%
|
|
| 6 | 23 |
11.6%
|
|
| 7 | 13 |
6.5%
|
|
| 8 | 30 |
15.1%
|
|
| 9 | 21 |
10.6%
|
|
| 10 | Very effective | 46 |
23.1%
|
| 11 | Don't know | 69 | |
| Sysmiss | 51 |