| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1.9%
|
|
| 1 | Not effective at all | 2 |
0.9%
|
| 2 | 5 |
2.3%
|
|
| 3 | 8 |
3.7%
|
|
| 4 | 6 |
2.8%
|
|
| 5 | 36 |
16.7%
|
|
| 6 | 13 |
6%
|
|
| 7 | 13 |
6%
|
|
| 8 | 12 |
5.6%
|
|
| 9 | 15 |
6.9%
|
|
| 10 | Very effective | 15 |
6.9%
|
| 11 | Don't know | 87 |
40.3%
|
| Sysmiss | 5 |