| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.4%
|
|
| 1 | Not effective at all | 3 |
1.3%
|
| 2 | 2 |
0.9%
|
|
| 3 | 9 |
4%
|
|
| 4 | 8 |
3.6%
|
|
| 5 | 9 |
4%
|
|
| 6 | 12 |
5.3%
|
|
| 7 | 20 |
8.9%
|
|
| 8 | 21 |
9.3%
|
|
| 9 | 19 |
8.4%
|
|
| 10 | Very effective | 12 |
5.3%
|
| 11 | Don't know | 109 |
48.4%
|
| Sysmiss | 11 |