| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 28 |
3.7%
|
| 2 | 20 |
2.7%
|
|
| 3 | 25 |
3.3%
|
|
| 4 | 45 |
6%
|
|
| 5 | 107 |
14.2%
|
|
| 6 | 134 |
17.8%
|
|
| 7 | 98 |
13%
|
|
| 8 | 119 |
15.8%
|
|
| 9 | 61 |
8.1%
|
|
| 10 | Very effective | 69 |
9.2%
|
| 11 | 45 |
6%
|