| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
2.6%
|
| 2 | 2 |
1%
|
|
| 3 | 3 |
1.6%
|
|
| 4 | 8 |
4.2%
|
|
| 5 | 12 |
6.3%
|
|
| 6 | 18 |
9.4%
|
|
| 7 | 14 |
7.3%
|
|
| 8 | 9 |
4.7%
|
|
| 9 | 8 |
4.2%
|
|
| 10 | Very effective | 2 |
1%
|
| 11 | Don't know | 110 |
57.6%
|
| Sysmiss | 12 |