| Value | Category | Cases | |
|---|---|---|---|
| 2 | 1 |
0.8%
|
|
| 3 | 7 |
5.8%
|
|
| 4 | 3 |
2.5%
|
|
| 5 | 15 |
12.4%
|
|
| 6 | 12 |
9.9%
|
|
| 7 | 25 |
20.7%
|
|
| 8 | 17 |
14%
|
|
| 9 | 13 |
10.7%
|
|
| 10 | Very effective | 19 |
15.7%
|
| 11 | Don't know | 9 |
7.4%
|