| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.8%
|
| 2 | 2 |
3.6%
|
|
| 3 | 2 |
3.6%
|
|
| 4 | 10 |
18.2%
|
|
| 5 | 6 |
10.9%
|
|
| 6 | 10 |
18.2%
|
|
| 7 | 14 |
25.5%
|
|
| 8 | 6 |
10.9%
|
|
| 9 | 2 |
3.6%
|
|
| 10 | Very effective | 2 |
3.6%
|
| 11 | Don't know | 46 | |
| Sysmiss | 3 |