| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.4%
|
| 2 | 1 |
1.4%
|
|
| 3 | 2 |
2.8%
|
|
| 4 | 3 |
4.2%
|
|
| 5 | 3 |
4.2%
|
|
| 6 | 10 |
13.9%
|
|
| 7 | 13 |
18.1%
|
|
| 8 | 11 |
15.3%
|
|
| 9 | 4 |
5.6%
|
|
| 10 | Very effective | 4 |
5.6%
|
| 11 | Don't know | 20 |
27.8%
|
| Sysmiss | 12 |