| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.9%
|
| 3 | 4 |
3.6%
|
|
| 4 | 7 |
6.4%
|
|
| 5 | 22 |
20%
|
|
| 6 | 20 |
18.2%
|
|
| 7 | 19 |
17.3%
|
|
| 8 | 18 |
16.4%
|
|
| 9 | 15 |
13.6%
|
|
| 10 | Very effective | 4 |
3.6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 81 |