| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
2.5%
|
| 3 | 3 |
3.8%
|
|
| 4 | 1 |
1.3%
|
|
| 5 | 16 |
20.3%
|
|
| 6 | 8 |
10.1%
|
|
| 7 | 11 |
13.9%
|
|
| 8 | 10 |
12.7%
|
|
| 9 | 7 |
8.9%
|
|
| 10 | Very effective | 4 |
5.1%
|
| 11 | Don't know | 17 |
21.5%
|
| Sysmiss | 5 |