| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
2.5%
|
| 2 | 5 |
1.8%
|
|
| 3 | 7 |
2.5%
|
|
| 4 | 11 |
3.9%
|
|
| 5 | 23 |
8.1%
|
|
| 6 | 25 |
8.8%
|
|
| 7 | 22 |
7.7%
|
|
| 8 | 21 |
7.4%
|
|
| 9 | 16 |
5.6%
|
|
| 10 | Very effective | 14 |
4.9%
|
| 11 | Don't know | 133 |
46.8%
|
| Sysmiss | 19 |