| Value | Category | Cases | |
|---|---|---|---|
| -99 | 9 |
4.1%
|
|
| 1 | Not effective at all | 3 |
1.4%
|
| 2 | 8 |
3.7%
|
|
| 3 | 7 |
3.2%
|
|
| 4 | 9 |
4.1%
|
|
| 5 | 16 |
7.4%
|
|
| 6 | 19 |
8.8%
|
|
| 7 | 21 |
9.7%
|
|
| 8 | 25 |
11.5%
|
|
| 9 | 11 |
5.1%
|
|
| 10 | Very effective | 6 |
2.8%
|
| 11 | Don't know | 83 |
38.2%
|
| Sysmiss | 3 |