| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.4%
|
| 2 | 8 |
2.8%
|
|
| 3 | 17 |
5.9%
|
|
| 4 | 23 |
7.9%
|
|
| 5 | 33 |
11.4%
|
|
| 6 | 44 |
15.2%
|
|
| 7 | 57 |
19.7%
|
|
| 8 | 60 |
20.7%
|
|
| 9 | 23 |
7.9%
|
|
| 10 | Very effective | 21 |
7.2%
|
| 11 | Don't know | 62 | |
| Sysmiss | 14 |