| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 - Not effective at all | 6 |
2.3%
|
| 2 | 2 | 3 |
1.2%
|
| 3 | 3 | 10 |
3.9%
|
| 4 | 4 | 11 |
4.3%
|
| 5 | 5 | 11 |
4.3%
|
| 6 | 6 | 23 |
8.9%
|
| 7 | 7 | 22 |
8.5%
|
| 8 | 8 | 21 |
8.1%
|
| 9 | 9 | 3 |
1.2%
|
| 10 | 10 - Very effective | 7 |
2.7%
|
| 11 | Don't know | 141 |
54.7%
|