| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
1.6%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 2 |
0.5%
|
|
| 3 | 1 |
0.3%
|
|
| 4 | 3 |
0.8%
|
|
| 5 | 23 |
6%
|
|
| 6 | 26 |
6.8%
|
|
| 7 | 50 |
13.1%
|
|
| 8 | 72 |
18.8%
|
|
| 9 | 45 |
11.8%
|
|
| 10 | Very effective | 24 |
6.3%
|
| 11 | Don't know | 128 |
33.5%
|
| Sysmiss | 47 |