| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 11 |
6.3%
|
| 2 | 16 |
9.1%
|
|
| 3 | 16 |
9.1%
|
|
| 4 | 28 |
16%
|
|
| 5 | 49 |
28%
|
|
| 6 | 15 |
8.6%
|
|
| 7 | 22 |
12.6%
|
|
| 8 | 11 |
6.3%
|
|
| 9 | 4 |
2.3%
|
|
| 10 | Very effective | 3 |
1.7%
|
| 11 | Don't know | 131 |