| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
1.8%
|
| 2 | 14 |
3.1%
|
|
| 3 | 26 |
5.8%
|
|
| 4 | 35 |
7.8%
|
|
| 5 | 70 |
15.5%
|
|
| 6 | 75 |
16.6%
|
|
| 7 | 108 |
23.9%
|
|
| 8 | 56 |
12.4%
|
|
| 9 | 37 |
8.2%
|
|
| 10 | Very effective | 22 |
4.9%
|
| 11 | Don't know | 41 | |
| Sysmiss | 13 |