| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.8%
|
| 2 | 5 |
1.8%
|
|
| 3 | 5 |
1.8%
|
|
| 4 | 14 |
5%
|
|
| 5 | 28 |
10%
|
|
| 6 | 13 |
4.7%
|
|
| 7 | 16 |
5.7%
|
|
| 8 | 27 |
9.7%
|
|
| 9 | 20 |
7.2%
|
|
| 10 | Very effective | 42 |
15.1%
|
| 11 | Don't know | 104 |
37.3%
|
| Sysmiss | 14 |