| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.3%
|
| 2 | 1 |
0.6%
|
|
| 3 | 8 |
5.1%
|
|
| 4 | 9 |
5.7%
|
|
| 5 | 18 |
11.5%
|
|
| 6 | 23 |
14.6%
|
|
| 7 | 34 |
21.7%
|
|
| 8 | 32 |
20.4%
|
|
| 9 | 20 |
12.7%
|
|
| 10 | Very effective | 10 |
6.4%
|
| 11 | Don't know | 65 | |
| Sysmiss | 31 |