| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.6%
|
| 3 | 3 |
2.4%
|
|
| 4 | 9 |
7.3%
|
|
| 5 | 15 |
12.2%
|
|
| 6 | 27 |
22%
|
|
| 7 | 20 |
16.3%
|
|
| 8 | 29 |
23.6%
|
|
| 9 | 13 |
10.6%
|
|
| 10 | Very effective | 5 |
4.1%
|
| 11 | Don't know | 116 | |
| Sysmiss | 30 |