| Value | Category | Cases | |
|---|---|---|---|
| -99 | 7 |
2.3%
|
|
| 1 | Not effective at all | 12 |
3.9%
|
| 2 | 11 |
3.6%
|
|
| 3 | 22 |
7.2%
|
|
| 4 | 11 |
3.6%
|
|
| 5 | 30 |
9.9%
|
|
| 6 | 17 |
5.6%
|
|
| 7 | 32 |
10.5%
|
|
| 8 | 16 |
5.3%
|
|
| 9 | 16 |
5.3%
|
|
| 10 | Very effective | 40 |
13.2%
|
| 11 | Don't know | 90 |
29.6%
|
| Sysmiss | 22 |