| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.6%
|
|
| 1 | Not effective at all | 5 |
1.5%
|
| 2 | 2 |
0.6%
|
|
| 3 | 7 |
2.1%
|
|
| 4 | 10 |
3%
|
|
| 5 | 23 |
6.9%
|
|
| 6 | 29 |
8.7%
|
|
| 7 | 47 |
14%
|
|
| 8 | 34 |
10.1%
|
|
| 9 | 15 |
4.5%
|
|
| 10 | Very effective | 11 |
3.3%
|
| 11 | Don't know | 150 |
44.8%
|
| Sysmiss | 5 |