| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
2.5%
|
|
| 1 | Not effective at all | 4 |
2.5%
|
| 2 | 6 |
3.7%
|
|
| 3 | 9 |
5.5%
|
|
| 4 | 8 |
4.9%
|
|
| 5 | 12 |
7.4%
|
|
| 6 | 15 |
9.2%
|
|
| 7 | 22 |
13.5%
|
|
| 8 | 11 |
6.7%
|
|
| 9 | 8 |
4.9%
|
|
| 10 | Very effective | 7 |
4.3%
|
| 11 | Don't know | 57 |
35%
|
| Sysmiss | 4 |