| Value | Category | Cases | |
|---|---|---|---|
| -99 | 5 |
1.9%
|
|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 4 |
1.5%
|
|
| 3 | 6 |
2.2%
|
|
| 4 | 22 |
8.1%
|
|
| 5 | 10 |
3.7%
|
|
| 6 | 18 |
6.7%
|
|
| 7 | 38 |
14.1%
|
|
| 8 | 37 |
13.7%
|
|
| 9 | 20 |
7.4%
|
|
| 10 | Very effective | 14 |
5.2%
|
| 11 | Don't know | 94 |
34.8%
|
| Sysmiss | 9 |