| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.3%
|
| 2 | 4 |
5%
|
|
| 3 | 6 |
7.5%
|
|
| 4 | 7 |
8.8%
|
|
| 5 | 12 |
15%
|
|
| 6 | 15 |
18.8%
|
|
| 7 | 16 |
20%
|
|
| 8 | 13 |
16.3%
|
|
| 9 | 5 |
6.3%
|
|
| 10 | Very effective | 1 |
1.3%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 5 |