| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.4%
|
| 2 | 8 |
2.8%
|
|
| 3 | 10 |
3.6%
|
|
| 4 | 20 |
7.1%
|
|
| 5 | 42 |
14.9%
|
|
| 6 | 49 |
17.4%
|
|
| 7 | 66 |
23.5%
|
|
| 8 | 53 |
18.9%
|
|
| 9 | 20 |
7.1%
|
|
| 10 | Very effective | 9 |
3.2%
|
| 11 | Don't know | 74 | |
| Sysmiss | 11 |