| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.9%
|
| 2 | 5 |
4.8%
|
|
| 3 | 7 |
6.7%
|
|
| 4 | 9 |
8.7%
|
|
| 5 | 8 |
7.7%
|
|
| 6 | 11 |
10.6%
|
|
| 7 | 15 |
14.4%
|
|
| 8 | 10 |
9.6%
|
|
| 9 | 8 |
7.7%
|
|
| 10 | Very effective | 1 |
1%
|
| 11 | Don't know | 28 |
26.9%
|
| Sysmiss | 8 |