| Value | Category | Cases | |
|---|---|---|---|
| -99 | 5 |
1.3%
|
|
| 1 | Not effective at all | 5 |
1.3%
|
| 2 | 10 |
2.5%
|
|
| 3 | 15 |
3.8%
|
|
| 4 | 23 |
5.8%
|
|
| 5 | 31 |
7.8%
|
|
| 6 | 34 |
8.6%
|
|
| 7 | 46 |
11.6%
|
|
| 8 | 30 |
7.6%
|
|
| 9 | 14 |
3.5%
|
|
| 10 | Very effective | 14 |
3.5%
|
| 11 | Don't know | 168 |
42.5%
|
| Sysmiss | 12 |