| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1.9%
|
|
| 1 | Not effective at all | 2 |
0.9%
|
| 2 | 4 |
1.9%
|
|
| 3 | 8 |
3.7%
|
|
| 4 | 8 |
3.7%
|
|
| 5 | 18 |
8.4%
|
|
| 6 | 40 |
18.7%
|
|
| 7 | 14 |
6.5%
|
|
| 8 | 25 |
11.7%
|
|
| 9 | 7 |
3.3%
|
|
| 10 | Very effective | 24 |
11.2%
|
| 11 | Don't know | 60 |
28%
|
| Sysmiss | 6 |