| Value | Category | Cases | |
|---|---|---|---|
| -99 | 7 |
2.9%
|
|
| 1 | Not effective at all | 6 |
2.5%
|
| 2 | 4 |
1.7%
|
|
| 3 | 6 |
2.5%
|
|
| 4 | 10 |
4.2%
|
|
| 5 | 28 |
11.7%
|
|
| 6 | 33 |
13.8%
|
|
| 7 | 36 |
15.1%
|
|
| 8 | 28 |
11.7%
|
|
| 9 | 14 |
5.9%
|
|
| 10 | Very effective | 7 |
2.9%
|
| 11 | Don't know | 60 |
25.1%
|
| Sysmiss | 5 |