| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.4%
|
| 2 | 3 |
1.4%
|
|
| 3 | 8 |
3.7%
|
|
| 4 | 7 |
3.2%
|
|
| 5 | 21 |
9.7%
|
|
| 6 | 20 |
9.3%
|
|
| 7 | 28 |
13%
|
|
| 8 | 30 |
13.9%
|
|
| 9 | 22 |
10.2%
|
|
| 10 | Very effective | 42 |
19.4%
|
| 11 | 32 |
14.8%
|