| Value | Category | Cases | |
|---|---|---|---|
| -99 | 9 |
4.2%
|
|
| 1 | Not effective at all | 1 |
0.5%
|
| 2 | 3 |
1.4%
|
|
| 3 | 2 |
0.9%
|
|
| 4 | 11 |
5.1%
|
|
| 5 | 25 |
11.7%
|
|
| 6 | 14 |
6.5%
|
|
| 7 | 25 |
11.7%
|
|
| 8 | 25 |
11.7%
|
|
| 9 | 14 |
6.5%
|
|
| 10 | Very effective | 14 |
6.5%
|
| 11 | Don't know | 71 |
33.2%
|
| Sysmiss | 6 |