| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
8.6%
|
| 2 | 8 |
8.6%
|
|
| 3 | 9 |
9.7%
|
|
| 4 | 11 |
11.8%
|
|
| 5 | 14 |
15.1%
|
|
| 6 | 18 |
19.4%
|
|
| 7 | 9 |
9.7%
|
|
| 8 | 10 |
10.8%
|
|
| 9 | 5 |
5.4%
|
|
| 10 | Very effective | 1 |
1.1%
|
| -99 | 20 | ||
| 11 | Don't know | 116 | |
| Sysmiss | 25 |