| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.5%
|
| 2 | 3 |
2.5%
|
|
| 3 | 10 |
8.4%
|
|
| 4 | 7 |
5.9%
|
|
| 5 | 14 |
11.8%
|
|
| 6 | 20 |
16.8%
|
|
| 7 | 24 |
20.2%
|
|
| 8 | 22 |
18.5%
|
|
| 9 | 12 |
10.1%
|
|
| 10 | Very effective | 4 |
3.4%
|
| -99 | 6 | ||
| 11 | Don't know | 112 | |
| Sysmiss | 23 |