| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
3.5%
|
| 2 | 9 |
5.2%
|
|
| 3 | 20 |
11.6%
|
|
| 4 | 21 |
12.2%
|
|
| 5 | 17 |
9.9%
|
|
| 6 | 26 |
15.1%
|
|
| 7 | 34 |
19.8%
|
|
| 8 | 21 |
12.2%
|
|
| 9 | 13 |
7.6%
|
|
| 10 | Very effective | 5 |
2.9%
|
| 11 | Don't know | 48 | |
| Sysmiss | 42 |