| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 1 |
0.7%
|
|
| 3 | 7 |
4.9%
|
|
| 4 | 6 |
4.2%
|
|
| 5 | 9 |
6.3%
|
|
| 6 | 10 |
7%
|
|
| 7 | 31 |
21.8%
|
|
| 8 | 24 |
16.9%
|
|
| 9 | 29 |
20.4%
|
|
| 10 | Very effective | 24 |
16.9%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 24 |