| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.3%
|
|
| 1 | Not effective at all | 10 |
1.6%
|
| 2 | 6 |
1%
|
|
| 3 | 16 |
2.6%
|
|
| 4 | 35 |
5.7%
|
|
| 5 | 86 |
14.1%
|
|
| 6 | 80 |
13.1%
|
|
| 7 | 92 |
15.1%
|
|
| 8 | 87 |
14.2%
|
|
| 9 | 37 |
6.1%
|
|
| 10 | Very effective | 32 |
5.2%
|
| 11 | Don't know | 128 |
20.9%
|
| Sysmiss | 13 |