| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.8%
|
| 2 | 3 |
1.8%
|
|
| 3 | 5 |
2.9%
|
|
| 4 | 17 |
9.9%
|
|
| 5 | 30 |
17.5%
|
|
| 6 | 32 |
18.7%
|
|
| 7 | 35 |
20.5%
|
|
| 8 | 27 |
15.8%
|
|
| 9 | 8 |
4.7%
|
|
| 10 | Very effective | 11 |
6.4%
|
| 11 | Don't know | 58 | |
| Sysmiss | 24 |