| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
1.4%
|
|
| 1 | Not effective at all | 3 |
1.4%
|
| 2 | 3 |
1.4%
|
|
| 3 | 7 |
3.2%
|
|
| 4 | 12 |
5.5%
|
|
| 5 | 24 |
11.1%
|
|
| 6 | 13 |
6%
|
|
| 7 | 21 |
9.7%
|
|
| 8 | 32 |
14.7%
|
|
| 9 | 10 |
4.6%
|
|
| 10 | Very effective | 16 |
7.4%
|
| 11 | Don't know | 73 |
33.6%
|
| Sysmiss | 4 |