| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
1.4%
|
|
| 1 | Not effective at all | 2 |
0.9%
|
| 2 | 2 |
0.9%
|
|
| 3 | 7 |
3.2%
|
|
| 4 | 6 |
2.8%
|
|
| 5 | 32 |
14.7%
|
|
| 6 | 17 |
7.8%
|
|
| 7 | 18 |
8.3%
|
|
| 8 | 20 |
9.2%
|
|
| 9 | 6 |
2.8%
|
|
| 10 | Very effective | 21 |
9.6%
|
| 11 | Don't know | 84 |
38.5%
|
| Sysmiss | 3 |