| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.9%
|
| 2 | 3 |
1.9%
|
|
| 3 | 11 |
6.9%
|
|
| 4 | 14 |
8.8%
|
|
| 5 | 25 |
15.6%
|
|
| 6 | 28 |
17.5%
|
|
| 7 | 46 |
28.8%
|
|
| 8 | 25 |
15.6%
|
|
| 9 | 4 |
2.5%
|
|
| 10 | Very effective | 1 |
0.6%
|
| 11 | Don't know | 14 | |
| Sysmiss | 29 |