| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
3.5%
|
|
| 1 | Not effective at all | 13 |
7.6%
|
| 2 | 7 |
4.1%
|
|
| 3 | 11 |
6.4%
|
|
| 4 | 14 |
8.1%
|
|
| 5 | 16 |
9.3%
|
|
| 6 | 9 |
5.2%
|
|
| 7 | 12 |
7%
|
|
| 8 | 17 |
9.9%
|
|
| 9 | 7 |
4.1%
|
|
| 10 | Very effective | 20 |
11.6%
|
| 11 | Don't know | 40 |
23.3%
|
| Sysmiss | 3 |