| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.7%
|
| 2 | 8 |
2.7%
|
|
| 3 | 9 |
3.1%
|
|
| 4 | 17 |
5.8%
|
|
| 5 | 43 |
14.7%
|
|
| 6 | 46 |
15.7%
|
|
| 7 | 37 |
12.6%
|
|
| 8 | 58 |
19.8%
|
|
| 9 | 26 |
8.9%
|
|
| 10 | Very effective | 44 |
15%
|
| 11 | Don't know | 13 |