| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 4 | 6 |
7.9%
|
|
| 5 | 4 |
5.3%
|
|
| 6 | 5 |
6.6%
|
|
| 7 | 16 |
21.1%
|
|
| 8 | 11 |
14.5%
|
|
| 9 | 7 |
9.2%
|
|
| 10 | Very effective | 20 |
26.3%
|
| 11 | Don't know | 7 |
9.2%
|
| Sysmiss | 8 |