| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
1.8%
|
| 2 | 6 |
1.4%
|
|
| 3 | 13 |
3%
|
|
| 4 | 25 |
5.7%
|
|
| 5 | 36 |
8.2%
|
|
| 6 | 34 |
7.8%
|
|
| 7 | 40 |
9.2%
|
|
| 8 | 50 |
11.4%
|
|
| 9 | 37 |
8.5%
|
|
| 10 | Very effective | 82 |
18.8%
|
| 11 | Don't know | 106 |
24.3%
|
| Sysmiss | 130 |