| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 11 |
5.9%
|
| 2 | 7 |
3.7%
|
|
| 3 | 7 |
3.7%
|
|
| 4 | 6 |
3.2%
|
|
| 5 | 16 |
8.5%
|
|
| 6 | 20 |
10.6%
|
|
| 7 | 29 |
15.4%
|
|
| 8 | 37 |
19.7%
|
|
| 9 | 28 |
14.9%
|
|
| 10 | Very effective | 27 |
14.4%
|
| 11 | Don't know | 183 | |
| Sysmiss | 50 |