| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 - Not effective at all | 9 |
3.5%
|
| 2 | 2 | 4 |
1.6%
|
| 3 | 3 | 9 |
3.5%
|
| 4 | 4 | 10 |
3.9%
|
| 5 | 5 | 10 |
3.9%
|
| 6 | 6 | 5 |
1.9%
|
| 7 | 7 | 7 |
2.7%
|
| 8 | 8 | 7 |
2.7%
|
| 9 | 9 | 0 |
0%
|
| 10 | 10 - Very effective | 0 |
0%
|
| 11 | Don't know | 197 |
76.4%
|