| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.5%
|
| 2 | 7 |
2.1%
|
|
| 3 | 4 |
1.2%
|
|
| 4 | 22 |
6.5%
|
|
| 5 | 34 |
10%
|
|
| 6 | 39 |
11.5%
|
|
| 7 | 46 |
13.6%
|
|
| 8 | 61 |
18%
|
|
| 9 | 29 |
8.6%
|
|
| 10 | Very effective | 43 |
12.7%
|
| 11 | Don't know | 49 |
14.5%
|
| Sysmiss | 15 |