| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.4%
|
| 2 | 3 |
1.4%
|
|
| 3 | 14 |
6.7%
|
|
| 4 | 17 |
8.1%
|
|
| 5 | 26 |
12.4%
|
|
| 6 | 37 |
17.6%
|
|
| 7 | 35 |
16.7%
|
|
| 8 | 30 |
14.3%
|
|
| 9 | 17 |
8.1%
|
|
| 10 | Very effective | 28 |
13.3%
|
| 11 | Don't know | 20 | |
| Sysmiss | 8 |