| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.4%
|
| 2 | 6 |
4.9%
|
|
| 4 | 7 |
5.7%
|
|
| 5 | 9 |
7.3%
|
|
| 6 | 12 |
9.8%
|
|
| 7 | 12 |
9.8%
|
|
| 8 | 5 |
4.1%
|
|
| 9 | 2 |
1.6%
|
|
| 10 | Very effective | 6 |
4.9%
|
| 11 | Don't know | 61 |
49.6%
|
| Sysmiss | 33 |