| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
3.8%
|
| 2 | 4 |
3.8%
|
|
| 3 | 3 |
2.8%
|
|
| 4 | 7 |
6.6%
|
|
| 5 | 8 |
7.5%
|
|
| 6 | 15 |
14.2%
|
|
| 7 | 16 |
15.1%
|
|
| 8 | 22 |
20.8%
|
|
| 9 | 13 |
12.3%
|
|
| 10 | Very effective | 14 |
13.2%
|
| -99 | 13 | ||
| 11 | Don't know | 63 | |
| Sysmiss | 22 |