| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
2.8%
|
| 2 | 2 |
2.8%
|
|
| 3 | 3 |
4.2%
|
|
| 4 | 2 |
2.8%
|
|
| 5 | 12 |
16.9%
|
|
| 6 | 10 |
14.1%
|
|
| 7 | 11 |
15.5%
|
|
| 8 | 13 |
18.3%
|
|
| 9 | 10 |
14.1%
|
|
| 10 | Very effective | 6 |
8.5%
|
| -99 | 14 | ||
| 11 | Don't know | 82 | |
| Sysmiss | 16 |