| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
4.1%
|
|
| 1 | Not effective at all | 4 |
2.7%
|
| 2 | 8 |
5.4%
|
|
| 3 | 7 |
4.8%
|
|
| 4 | 4 |
2.7%
|
|
| 5 | 11 |
7.5%
|
|
| 6 | 16 |
10.9%
|
|
| 7 | 14 |
9.5%
|
|
| 8 | 6 |
4.1%
|
|
| 9 | 4 |
2.7%
|
|
| 10 | Very effective | 7 |
4.8%
|
| 11 | Don't know | 60 |
40.8%
|
| Sysmiss | 5 |