| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1.7%
|
|
| 1 | Not effective at all | 9 |
3.8%
|
| 2 | 7 |
2.9%
|
|
| 3 | 6 |
2.5%
|
|
| 4 | 14 |
5.9%
|
|
| 5 | 23 |
9.6%
|
|
| 6 | 32 |
13.4%
|
|
| 7 | 25 |
10.5%
|
|
| 8 | 30 |
12.6%
|
|
| 9 | 8 |
3.3%
|
|
| 10 | Very effective | 14 |
5.9%
|
| 11 | Don't know | 67 |
28%
|
| Sysmiss | 5 |