| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.9%
|
| 2 | 6 |
5.7%
|
|
| 3 | 4 |
3.8%
|
|
| 4 | 6 |
5.7%
|
|
| 5 | 10 |
9.4%
|
|
| 6 | 6 |
5.7%
|
|
| 7 | 17 |
16%
|
|
| 8 | 6 |
5.7%
|
|
| 9 | 1 |
0.9%
|
|
| 10 | Very effective | 2 |
1.9%
|
| 11 | Don't know | 47 |
44.3%
|
| Sysmiss | 6 |