| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
2.6%
|
| 3 | 10 |
5.3%
|
|
| 4 | 14 |
7.4%
|
|
| 5 | 21 |
11.1%
|
|
| 6 | 18 |
9.5%
|
|
| 7 | 26 |
13.7%
|
|
| 8 | 32 |
16.8%
|
|
| 9 | 25 |
13.2%
|
|
| 10 | Very effective | 39 |
20.5%
|
| 11 | Don't know | 78 | |
| Sysmiss | 51 |