| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
3.5%
|
|
| 1 | Not effective at all | 20 |
11.6%
|
| 2 | 21 |
12.2%
|
|
| 3 | 11 |
6.4%
|
|
| 4 | 13 |
7.6%
|
|
| 5 | 14 |
8.1%
|
|
| 6 | 8 |
4.7%
|
|
| 7 | 7 |
4.1%
|
|
| 8 | 6 |
3.5%
|
|
| 9 | 5 |
2.9%
|
|
| 10 | Very effective | 15 |
8.7%
|
| 11 | Don't know | 46 |
26.7%
|
| Sysmiss | 3 |