| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
3.9%
|
| 2 | 2 |
1.9%
|
|
| 3 | 4 |
3.9%
|
|
| 4 | 4 |
3.9%
|
|
| 5 | 9 |
8.7%
|
|
| 6 | 9 |
8.7%
|
|
| 7 | 11 |
10.7%
|
|
| 8 | 27 |
26.2%
|
|
| 9 | 19 |
18.4%
|
|
| 10 | Very effective | 14 |
13.6%
|
| -99 | 14 | ||
| 11 | Don't know | 65 | |
| Sysmiss | 22 |