| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
3.8%
|
| 2 | 5 |
4.8%
|
|
| 3 | 1 |
1%
|
|
| 4 | 7 |
6.7%
|
|
| 5 | 16 |
15.2%
|
|
| 6 | 17 |
16.2%
|
|
| 7 | 8 |
7.6%
|
|
| 8 | 7 |
6.7%
|
|
| 9 | 3 |
2.9%
|
|
| 10 | Very effective | 5 |
4.8%
|
| 11 | Don't know | 32 |
30.5%
|