| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.2%
|
| 2 | 14 |
3.3%
|
|
| 3 | 13 |
3.1%
|
|
| 4 | 22 |
5.2%
|
|
| 5 | 76 |
18.1%
|
|
| 6 | 91 |
21.7%
|
|
| 7 | 79 |
18.8%
|
|
| 8 | 66 |
15.7%
|
|
| 9 | 40 |
9.5%
|
|
| 10 | Very effective | 14 |
3.3%
|
| 11 | Don't know | 68 | |
| Sysmiss | 17 |