| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.5%
|
| 2 | 3 |
1.1%
|
|
| 3 | 9 |
3.4%
|
|
| 4 | 20 |
7.5%
|
|
| 5 | 58 |
21.7%
|
|
| 6 | 49 |
18.4%
|
|
| 7 | 39 |
14.6%
|
|
| 8 | 34 |
12.7%
|
|
| 9 | 22 |
8.2%
|
|
| 10 | Very effective | 29 |
10.9%
|
| 11 | Don't know | 44 | |
| Sysmiss | 85 |