| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
1.5%
|
|
| 1 | Not effective at all | 3 |
1.5%
|
| 2 | 12 |
6%
|
|
| 3 | 13 |
6.5%
|
|
| 4 | 21 |
10.4%
|
|
| 5 | 28 |
13.9%
|
|
| 6 | 21 |
10.4%
|
|
| 7 | 33 |
16.4%
|
|
| 8 | 16 |
8%
|
|
| 9 | 9 |
4.5%
|
|
| 10 | Very effective | 2 |
1%
|
| 11 | Don't know | 40 |
19.9%
|
| Sysmiss | 24 |