| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
0.8%
|
| 2 | 6 |
1%
|
|
| 3 | 20 |
3.3%
|
|
| 4 | 18 |
3%
|
|
| 5 | 54 |
8.9%
|
|
| 6 | 47 |
7.8%
|
|
| 7 | 52 |
8.6%
|
|
| 8 | 68 |
11.2%
|
|
| 9 | 57 |
9.4%
|
|
| 10 | Very effective | 46 |
7.6%
|
| 11 | Don't know | 187 |
30.9%
|
| Sysmiss | 46 |
7.6%
|