| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.2%
|
| 2 | 6 |
2.5%
|
|
| 3 | 15 |
6.2%
|
|
| 4 | 21 |
8.7%
|
|
| 5 | 22 |
9.1%
|
|
| 6 | 35 |
14.5%
|
|
| 7 | 48 |
19.9%
|
|
| 8 | 52 |
21.6%
|
|
| 9 | 19 |
7.9%
|
|
| 10 | Very effective | 20 |
8.3%
|
| 11 | Don't know | 127 | |
| Sysmiss | 53 |