| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
3.4%
|
| 2 | 3 |
1.5%
|
|
| 3 | 11 |
5.4%
|
|
| 4 | 8 |
3.9%
|
|
| 5 | 18 |
8.9%
|
|
| 6 | 22 |
10.8%
|
|
| 7 | 26 |
12.8%
|
|
| 8 | 34 |
16.7%
|
|
| 9 | 30 |
14.8%
|
|
| 10 | Very effective | 44 |
21.7%
|
| -99 | 15 | ||
| 11 | Don't know | 82 | |
| Sysmiss | 52 |