| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
1.9%
|
|
| 1 | Not effective at all | 2 |
1.9%
|
| 2 | 5 |
4.9%
|
|
| 3 | 3 |
2.9%
|
|
| 4 | 7 |
6.8%
|
|
| 5 | 14 |
13.6%
|
|
| 6 | 9 |
8.7%
|
|
| 7 | 8 |
7.8%
|
|
| 8 | 8 |
7.8%
|
|
| 9 | 5 |
4.9%
|
|
| 10 | Very effective | 2 |
1.9%
|
| 11 | Don't know | 38 |
36.9%
|
| Sysmiss | 4 |