| Value | Category | Cases | |
|---|---|---|---|
| -99 | 10 |
3.6%
|
|
| 1 | Not effective at all | 3 |
1.1%
|
| 2 | 7 |
2.5%
|
|
| 3 | 5 |
1.8%
|
|
| 4 | 10 |
3.6%
|
|
| 5 | 15 |
5.4%
|
|
| 6 | 24 |
8.6%
|
|
| 7 | 29 |
10.4%
|
|
| 8 | 39 |
14%
|
|
| 9 | 11 |
4%
|
|
| 10 | Very effective | 15 |
5.4%
|
| 11 | Don't know | 110 |
39.6%
|
| Sysmiss | 1 |