| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.2%
|
| 2 | 3 |
1.2%
|
|
| 3 | 3 |
1.2%
|
|
| 4 | 3 |
1.2%
|
|
| 5 | 12 |
4.6%
|
|
| 6 | 16 |
6.2%
|
|
| 7 | 28 |
10.8%
|
|
| 8 | 63 |
24.2%
|
|
| 9 | 45 |
17.3%
|
|
| 10 | Very effective | 24 |
9.2%
|
| 11 | 60 |
23.1%
|