| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.9%
|
| 2 | 4 |
1.5%
|
|
| 3 | 5 |
1.9%
|
|
| 4 | 5 |
1.9%
|
|
| 5 | 14 |
5.2%
|
|
| 6 | 20 |
7.4%
|
|
| 7 | 60 |
22.3%
|
|
| 8 | 65 |
24.2%
|
|
| 9 | 54 |
20.1%
|
|
| 10 | Very effective | 37 |
13.8%
|
| 11 | Don't know | 104 | |
| Sysmiss | 48 |