| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1%
|
| 2 | 4 |
3.9%
|
|
| 3 | 9 |
8.8%
|
|
| 4 | 9 |
8.8%
|
|
| 5 | 17 |
16.7%
|
|
| 6 | 20 |
19.6%
|
|
| 7 | 13 |
12.7%
|
|
| 8 | 21 |
20.6%
|
|
| 9 | 7 |
6.9%
|
|
| 10 | Very effective | 1 |
1%
|
| -99 | 6 | ||
| 11 | Don't know | 128 | |
| Sysmiss | 24 |