| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.7%
|
| 2 | 1 |
1.7%
|
|
| 3 | 3 |
5%
|
|
| 5 | 5 |
8.3%
|
|
| 6 | 9 |
15%
|
|
| 7 | 7 |
11.7%
|
|
| 8 | 20 |
33.3%
|
|
| 9 | 11 |
18.3%
|
|
| 10 | Very effective | 3 |
5%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 78 |