| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
3.8%
|
| 2 | 5 |
2.7%
|
|
| 3 | 8 |
4.4%
|
|
| 4 | 18 |
9.9%
|
|
| 5 | 48 |
26.4%
|
|
| 6 | 29 |
15.9%
|
|
| 7 | 29 |
15.9%
|
|
| 8 | 21 |
11.5%
|
|
| 9 | 10 |
5.5%
|
|
| 10 | Very effective | 7 |
3.8%
|
| 11 | Don't know | 124 |