| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
2.6%
|
| 2 | 6 |
2.6%
|
|
| 3 | 10 |
4.3%
|
|
| 4 | 11 |
4.8%
|
|
| 5 | 16 |
7%
|
|
| 6 | 23 |
10%
|
|
| 7 | 31 |
13.5%
|
|
| 8 | 45 |
19.6%
|
|
| 9 | 31 |
13.5%
|
|
| 10 | Very effective | 18 |
7.8%
|
| 11 | Don't know | 33 |
14.3%
|
| Sysmiss | 18 |