| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
2.3%
|
| 2 | 3 |
1.2%
|
|
| 3 | 4 |
1.5%
|
|
| 4 | 3 |
1.2%
|
|
| 5 | 20 |
7.7%
|
|
| 6 | 7 |
2.7%
|
|
| 7 | 16 |
6.2%
|
|
| 8 | 20 |
7.7%
|
|
| 9 | 16 |
6.2%
|
|
| 10 | Very effective | 24 |
9.3%
|
| 11 | Don't know | 140 |
54.1%
|
| Sysmiss | 34 |