| Value | Category | Cases | |
|---|---|---|---|
| 3 | 2 |
1.7%
|
|
| 4 | 4 |
3.3%
|
|
| 5 | 15 |
12.4%
|
|
| 6 | 18 |
14.9%
|
|
| 7 | 16 |
13.2%
|
|
| 8 | 22 |
18.2%
|
|
| 9 | 17 |
14%
|
|
| 10 | Very effective | 20 |
16.5%
|
| 11 | Don't know | 7 |
5.8%
|