| Value | Category | Cases | |
|---|---|---|---|
| -99 | 11 |
4.7%
|
|
| 1 | Not effective at all | 6 |
2.6%
|
| 2 | 8 |
3.4%
|
|
| 3 | 9 |
3.9%
|
|
| 4 | 19 |
8.2%
|
|
| 5 | 31 |
13.4%
|
|
| 6 | 23 |
9.9%
|
|
| 7 | 22 |
9.5%
|
|
| 8 | 15 |
6.5%
|
|
| 9 | 8 |
3.4%
|
|
| 10 | Very effective | 4 |
1.7%
|
| 11 | Don't know | 76 |
32.8%
|
| Sysmiss | 12 |