| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
4.8%
|
| 2 | 7 |
8.4%
|
|
| 3 | 2 |
2.4%
|
|
| 4 | 5 |
6%
|
|
| 5 | 8 |
9.6%
|
|
| 6 | 5 |
6%
|
|
| 7 | 7 |
8.4%
|
|
| 8 | 9 |
10.8%
|
|
| 9 | 12 |
14.5%
|
|
| 10 | Very effective | 24 |
28.9%
|
| 11 | Don't know | 67 | |
| Sysmiss | 30 |