| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 1 |
0.6%
|
|
| 3 | 1 |
0.6%
|
|
| 4 | 1 |
0.6%
|
|
| 5 | 11 |
6.4%
|
|
| 6 | 9 |
5.2%
|
|
| 7 | 15 |
8.7%
|
|
| 8 | 39 |
22.5%
|
|
| 9 | 61 |
35.3%
|
|
| 10 | Very effective | 35 |
20.2%
|
| 11 | Don't know | 29 |