| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.2%
|
| 2 | 3 |
1.9%
|
|
| 3 | 9 |
5.6%
|
|
| 4 | 7 |
4.3%
|
|
| 5 | 22 |
13.7%
|
|
| 6 | 17 |
10.6%
|
|
| 7 | 31 |
19.3%
|
|
| 8 | 30 |
18.6%
|
|
| 9 | 23 |
14.3%
|
|
| 10 | Very effective | 17 |
10.6%
|
| 11 | Don't know | 207 | |
| Sysmiss | 53 |