| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 6 |
2.2%
|
|
| 3 | 14 |
5.1%
|
|
| 4 | 24 |
8.7%
|
|
| 5 | 68 |
24.6%
|
|
| 6 | 46 |
16.7%
|
|
| 7 | 33 |
12%
|
|
| 8 | 37 |
13.4%
|
|
| 9 | 25 |
9.1%
|
|
| 10 | Very effective | 22 |
8%
|
| 11 | Don't know | 34 | |
| Sysmiss | 86 |