| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.4%
|
| 2 | 4 |
2.8%
|
|
| 3 | 3 |
2.1%
|
|
| 4 | 5 |
3.5%
|
|
| 5 | 14 |
9.9%
|
|
| 6 | 22 |
15.6%
|
|
| 7 | 33 |
23.4%
|
|
| 8 | 34 |
24.1%
|
|
| 9 | 13 |
9.2%
|
|
| 10 | Very effective | 11 |
7.8%
|
| 11 | Don't know | 80 | |
| Sysmiss | 32 |