| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 1 |
0.8%
|
|
| 3 | 6 |
4.5%
|
|
| 4 | 9 |
6.8%
|
|
| 5 | 26 |
19.5%
|
|
| 6 | 17 |
12.8%
|
|
| 7 | 29 |
21.8%
|
|
| 8 | 22 |
16.5%
|
|
| 9 | 13 |
9.8%
|
|
| 10 | Very effective | 9 |
6.8%
|
| 11 | Don't know | 57 | |
| Sysmiss | 32 |