| Value | Category | Cases | |
|---|---|---|---|
| -99 | 9 |
2.4%
|
|
| 1 | Not effective at all | 3 |
0.8%
|
| 2 | 1 |
0.3%
|
|
| 3 | 6 |
1.6%
|
|
| 4 | 11 |
2.9%
|
|
| 5 | 22 |
5.8%
|
|
| 6 | 31 |
8.2%
|
|
| 7 | 46 |
12.1%
|
|
| 8 | 49 |
12.9%
|
|
| 9 | 22 |
5.8%
|
|
| 10 | Very effective | 11 |
2.9%
|
| 11 | Don't know | 169 |
44.5%
|
| Sysmiss | 49 |