| Value | Category | Cases | |
|---|---|---|---|
| -99 | 10 |
3.4%
|
|
| 1 | Not effective at all | 12 |
4.1%
|
| 2 | 17 |
5.7%
|
|
| 3 | 20 |
6.8%
|
|
| 4 | 12 |
4.1%
|
|
| 5 | 17 |
5.7%
|
|
| 6 | 23 |
7.8%
|
|
| 7 | 28 |
9.5%
|
|
| 8 | 15 |
5.1%
|
|
| 9 | 12 |
4.1%
|
|
| 10 | Very effective | 26 |
8.8%
|
| 11 | Don't know | 104 |
35.1%
|
| Sysmiss | 30 |