| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
1.5%
|
|
| 1 | Not effective at all | 6 |
1.5%
|
| 2 | 8 |
2%
|
|
| 3 | 6 |
1.5%
|
|
| 4 | 16 |
4.1%
|
|
| 5 | 37 |
9.4%
|
|
| 6 | 30 |
7.6%
|
|
| 7 | 56 |
14.2%
|
|
| 8 | 49 |
12.4%
|
|
| 9 | 26 |
6.6%
|
|
| 10 | Very effective | 35 |
8.9%
|
| 11 | Don't know | 120 |
30.4%
|
| Sysmiss | 12 |