| Value | Category | Cases | |
|---|---|---|---|
| -99 | 7 |
1.8%
|
|
| 1 | Not effective at all | 11 |
2.8%
|
| 2 | 7 |
1.8%
|
|
| 3 | 16 |
4.1%
|
|
| 4 | 16 |
4.1%
|
|
| 5 | 46 |
11.6%
|
|
| 6 | 32 |
8.1%
|
|
| 7 | 38 |
9.6%
|
|
| 8 | 30 |
7.6%
|
|
| 9 | 22 |
5.6%
|
|
| 10 | Very effective | 17 |
4.3%
|
| 11 | Don't know | 153 |
38.7%
|
| Sysmiss | 12 |