| Value | Category | Cases | |
|---|---|---|---|
| -99 | 7 |
1.8%
|
|
| 1 | Not effective at all | 4 |
1.1%
|
| 2 | 5 |
1.3%
|
|
| 3 | 4 |
1.1%
|
|
| 4 | 15 |
3.9%
|
|
| 5 | 24 |
6.3%
|
|
| 6 | 36 |
9.5%
|
|
| 7 | 63 |
16.6%
|
|
| 8 | 56 |
14.7%
|
|
| 9 | 33 |
8.7%
|
|
| 10 | Very effective | 24 |
6.3%
|
| 11 | Don't know | 109 |
28.7%
|
| Sysmiss | 4 |