| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
3.6%
|
| 2 | 7 |
12.5%
|
|
| 3 | 6 |
10.7%
|
|
| 4 | 6 |
10.7%
|
|
| 5 | 13 |
23.2%
|
|
| 6 | 6 |
10.7%
|
|
| 7 | 9 |
16.1%
|
|
| 8 | 6 |
10.7%
|
|
| 9 | 1 |
1.8%
|
|
| 10 | Very effective | 0 |
0%
|
| 11 | Don't know | 58 | |
| Sysmiss | 20 |