| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 3 |
1.1%
|
|
| 3 | 11 |
3.9%
|
|
| 4 | 23 |
8.1%
|
|
| 5 | 51 |
18%
|
|
| 6 | 57 |
20.1%
|
|
| 7 | 61 |
21.5%
|
|
| 8 | 44 |
15.5%
|
|
| 9 | 24 |
8.5%
|
|
| 10 | Very effective | 8 |
2.8%
|
| 11 | Don't know | 81 | |
| Sysmiss | 56 |