| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1.8%
|
|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 3 |
1.4%
|
|
| 3 | 6 |
2.8%
|
|
| 4 | 6 |
2.8%
|
|
| 5 | 34 |
15.7%
|
|
| 6 | 13 |
6%
|
|
| 7 | 29 |
13.4%
|
|
| 8 | 20 |
9.2%
|
|
| 9 | 13 |
6%
|
|
| 10 | Very effective | 22 |
10.1%
|
| 11 | Don't know | 66 |
30.4%
|
| Sysmiss | 4 |