| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
2.5%
|
| 2 | 10 |
3.5%
|
|
| 3 | 8 |
2.8%
|
|
| 4 | 6 |
2.1%
|
|
| 5 | 31 |
10.9%
|
|
| 6 | 24 |
8.4%
|
|
| 7 | 32 |
11.2%
|
|
| 8 | 28 |
9.8%
|
|
| 9 | 20 |
7%
|
|
| 10 | Very effective | 66 |
23.2%
|
| 11 | Don't know | 53 |
18.6%
|
| Sysmiss | 20 |