| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
2.8%
|
|
| 1 | Not effective at all | 5 |
3.5%
|
| 2 | 6 |
4.2%
|
|
| 3 | 9 |
6.3%
|
|
| 4 | 7 |
4.9%
|
|
| 5 | 18 |
12.5%
|
|
| 6 | 14 |
9.7%
|
|
| 7 | 11 |
7.6%
|
|
| 8 | 11 |
7.6%
|
|
| 9 | 5 |
3.5%
|
|
| 10 | Very effective | 7 |
4.9%
|
| 11 | Don't know | 47 |
32.6%
|
| Sysmiss | 8 |