| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
2.5%
|
| 2 | 11 |
4.7%
|
|
| 3 | 16 |
6.8%
|
|
| 4 | 25 |
10.6%
|
|
| 5 | 61 |
25.8%
|
|
| 6 | 38 |
16.1%
|
|
| 7 | 29 |
12.3%
|
|
| 8 | 32 |
13.6%
|
|
| 9 | 10 |
4.2%
|
|
| 10 | Very effective | 8 |
3.4%
|
| 11 | Don't know | 70 |