| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 - Not effective at all | 3 |
1.2%
|
| 2 | 2 | 0 |
0%
|
| 3 | 3 | 7 |
2.7%
|
| 4 | 4 | 11 |
4.3%
|
| 5 | 5 | 11 |
4.3%
|
| 6 | 6 | 17 |
6.6%
|
| 7 | 7 | 17 |
6.6%
|
| 8 | 8 | 19 |
7.4%
|
| 9 | 9 | 4 |
1.6%
|
| 10 | 10 - Very effective | 5 |
1.9%
|
| 11 | Don't know | 164 |
63.6%
|