| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
4.1%
|
|
| 1 | Not effective at all | 2 |
1.4%
|
| 2 | 9 |
6.1%
|
|
| 3 | 10 |
6.8%
|
|
| 4 | 6 |
4.1%
|
|
| 5 | 18 |
12.2%
|
|
| 6 | 13 |
8.8%
|
|
| 7 | 5 |
3.4%
|
|
| 8 | 5 |
3.4%
|
|
| 9 | 6 |
4.1%
|
|
| 10 | Very effective | 9 |
6.1%
|
| 11 | Don't know | 58 |
39.5%
|
| Sysmiss | 5 |