| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 4 |
1%
|
|
| 3 | 6 |
1.5%
|
|
| 4 | 20 |
5%
|
|
| 5 | 37 |
9.3%
|
|
| 6 | 37 |
9.3%
|
|
| 7 | 49 |
12.3%
|
|
| 8 | 56 |
14.1%
|
|
| 9 | 34 |
8.5%
|
|
| 10 | Very effective | 27 |
6.8%
|
| 11 | Don't know | 122 |
30.7%
|
| Sysmiss | 9 |