| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.5%
|
| 2 | 2 |
3%
|
|
| 4 | 4 |
6.1%
|
|
| 6 | 4 |
6.1%
|
|
| 7 | 12 |
18.2%
|
|
| 8 | 11 |
16.7%
|
|
| 9 | 18 |
27.3%
|
|
| 10 | Very effective | 14 |
21.2%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 98 |