| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
3.5%
|
| 2 | 1 |
1.2%
|
|
| 3 | 4 |
4.7%
|
|
| 4 | 7 |
8.1%
|
|
| 5 | 10 |
11.6%
|
|
| 6 | 7 |
8.1%
|
|
| 7 | 11 |
12.8%
|
|
| 8 | 11 |
12.8%
|
|
| 9 | 11 |
12.8%
|
|
| 10 | Very effective | 21 |
24.4%
|
| 11 | Don't know | 65 | |
| Sysmiss | 29 |