| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1.9%
|
|
| 1 | Not effective at all | 3 |
1.4%
|
| 2 | 4 |
1.9%
|
|
| 3 | 4 |
1.9%
|
|
| 4 | 13 |
6.1%
|
|
| 5 | 25 |
11.8%
|
|
| 6 | 24 |
11.3%
|
|
| 7 | 24 |
11.3%
|
|
| 8 | 24 |
11.3%
|
|
| 9 | 14 |
6.6%
|
|
| 10 | Very effective | 13 |
6.1%
|
| 11 | Don't know | 60 |
28.3%
|
| Sysmiss | 8 |