| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.1%
|
| 2 | 6 |
1.7%
|
|
| 3 | 4 |
1.1%
|
|
| 4 | 16 |
4.4%
|
|
| 5 | 32 |
8.9%
|
|
| 6 | 29 |
8.1%
|
|
| 7 | 84 |
23.3%
|
|
| 8 | 76 |
21.1%
|
|
| 9 | 57 |
15.8%
|
|
| 10 | Very effective | 52 |
14.4%
|
| 11 | Don't know | 53 | |
| Sysmiss | 8 |