| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1%
|
| 2 | 1 |
0.5%
|
|
| 3 | 5 |
2.6%
|
|
| 4 | 8 |
4.1%
|
|
| 5 | 14 |
7.3%
|
|
| 6 | 25 |
13%
|
|
| 7 | 32 |
16.6%
|
|
| 8 | 57 |
29.5%
|
|
| 9 | 27 |
14%
|
|
| 10 | Very effective | 22 |
11.4%
|
| 11 | Don't know | 181 | |
| Sysmiss | 47 |