| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 - Not effective at all | 4 |
1.6%
|
| 2 | 2 | 4 |
1.6%
|
| 3 | 3 | 10 |
3.9%
|
| 4 | 4 | 9 |
3.5%
|
| 5 | 5 | 18 |
7%
|
| 6 | 6 | 16 |
6.2%
|
| 7 | 7 | 23 |
8.9%
|
| 8 | 8 | 21 |
8.1%
|
| 9 | 9 | 4 |
1.6%
|
| 10 | 10 - Very effective | 6 |
2.3%
|
| 11 | Don't know | 143 |
55.4%
|