| Value | Category | Cases | |
|---|---|---|---|
| -99 | 5 |
1.3%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 1 |
0.3%
|
|
| 3 | 5 |
1.3%
|
|
| 4 | 6 |
1.6%
|
|
| 5 | 26 |
6.8%
|
|
| 6 | 27 |
7%
|
|
| 7 | 37 |
9.7%
|
|
| 8 | 45 |
11.7%
|
|
| 9 | 26 |
6.8%
|
|
| 10 | Very effective | 11 |
2.9%
|
| 11 | Don't know | 192 |
50.1%
|
| Sysmiss | 46 |