| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.4%
|
| 2 | 4 |
1.4%
|
|
| 3 | 4 |
1.4%
|
|
| 4 | 3 |
1%
|
|
| 5 | 9 |
3.1%
|
|
| 6 | 30 |
10.5%
|
|
| 7 | 33 |
11.5%
|
|
| 8 | 47 |
16.4%
|
|
| 9 | 44 |
15.3%
|
|
| 10 | Very effective | 41 |
14.3%
|
| 11 | Don't know | 68 |
23.7%
|
| Sysmiss | 151 |