| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
2.3%
|
| 2 | 3 |
1.7%
|
|
| 3 | 5 |
2.9%
|
|
| 4 | 8 |
4.6%
|
|
| 5 | 25 |
14.3%
|
|
| 6 | 35 |
20%
|
|
| 7 | 31 |
17.7%
|
|
| 8 | 25 |
14.3%
|
|
| 9 | 11 |
6.3%
|
|
| 10 | Very effective | 3 |
1.7%
|
| 11 | Don't know | 25 |
14.3%
|