| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
1.6%
|
|
| 1 | Not effective at all | 3 |
0.8%
|
| 2 | 3 |
0.8%
|
|
| 3 | 1 |
0.3%
|
|
| 4 | 2 |
0.5%
|
|
| 5 | 22 |
5.7%
|
|
| 6 | 24 |
6.3%
|
|
| 7 | 46 |
12%
|
|
| 8 | 72 |
18.8%
|
|
| 9 | 38 |
9.9%
|
|
| 10 | Very effective | 16 |
4.2%
|
| 11 | Don't know | 150 |
39.2%
|
| Sysmiss | 46 |