| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
4%
|
| 2 | 2 |
4%
|
|
| 3 | 5 |
10%
|
|
| 4 | 11 |
22%
|
|
| 5 | 10 |
20%
|
|
| 6 | 8 |
16%
|
|
| 7 | 7 |
14%
|
|
| 8 | 4 |
8%
|
|
| 10 | Very effective | 1 |
2%
|
| 11 | Don't know | 54 |