| Value | Category | Cases | |
|---|---|---|---|
| -99 | 8 |
3.7%
|
|
| 1 | Not effective at all | 7 |
3.3%
|
| 2 | 4 |
1.9%
|
|
| 3 | 7 |
3.3%
|
|
| 4 | 10 |
4.7%
|
|
| 5 | 25 |
11.7%
|
|
| 6 | 22 |
10.3%
|
|
| 7 | 17 |
7.9%
|
|
| 8 | 14 |
6.5%
|
|
| 9 | 6 |
2.8%
|
|
| 10 | Very effective | 12 |
5.6%
|
| 11 | Don't know | 82 |
38.3%
|
| Sysmiss | 6 |