| Value | Category | Cases | |
|---|---|---|---|
| -99 | 12 |
3.2%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 3 |
0.8%
|
|
| 3 | 4 |
1.1%
|
|
| 4 | 7 |
1.8%
|
|
| 5 | 22 |
5.8%
|
|
| 6 | 33 |
8.7%
|
|
| 7 | 54 |
14.2%
|
|
| 8 | 64 |
16.8%
|
|
| 9 | 29 |
7.6%
|
|
| 10 | Very effective | 15 |
3.9%
|
| 11 | Don't know | 135 |
35.5%
|
| Sysmiss | 49 |