| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
11.3%
|
| 2 | 3 |
5.7%
|
|
| 3 | 3 |
5.7%
|
|
| 4 | 5 |
9.4%
|
|
| 5 | 9 |
17%
|
|
| 6 | 6 |
11.3%
|
|
| 7 | 11 |
20.8%
|
|
| 8 | 7 |
13.2%
|
|
| 9 | 2 |
3.8%
|
|
| 10 | Very effective | 1 |
1.9%
|
| -99 | 8 | ||
| 11 | Don't know | 81 | |
| Sysmiss | 18 |