| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.6%
|
| 2 | 5 |
2.9%
|
|
| 3 | 3 |
1.7%
|
|
| 4 | 7 |
4%
|
|
| 5 | 20 |
11.4%
|
|
| 6 | 30 |
17.1%
|
|
| 7 | 32 |
18.3%
|
|
| 8 | 23 |
13.1%
|
|
| 9 | 15 |
8.6%
|
|
| 10 | Very effective | 5 |
2.9%
|
| 11 | Don't know | 34 |
19.4%
|