| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
2.6%
|
| 2 | 4 |
2.1%
|
|
| 3 | 11 |
5.8%
|
|
| 4 | 12 |
6.3%
|
|
| 5 | 20 |
10.6%
|
|
| 6 | 28 |
14.8%
|
|
| 7 | 26 |
13.8%
|
|
| 8 | 32 |
16.9%
|
|
| 9 | 22 |
11.6%
|
|
| 10 | Very effective | 29 |
15.3%
|
| 11 | Don't know | 78 | |
| Sysmiss | 52 |