| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
2.8%
|
| 3 | 5 |
3.5%
|
|
| 4 | 16 |
11.3%
|
|
| 5 | 17 |
12.1%
|
|
| 6 | 20 |
14.2%
|
|
| 7 | 28 |
19.9%
|
|
| 8 | 34 |
24.1%
|
|
| 9 | 15 |
10.6%
|
|
| 10 | Very effective | 2 |
1.4%
|
| 11 | Don't know | 37 | |
| Sysmiss | 15 |