| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1.5%
|
|
| 1 | Not effective at all | 11 |
4.2%
|
| 2 | 14 |
5.4%
|
|
| 3 | 24 |
9.3%
|
|
| 4 | 26 |
10%
|
|
| 5 | 23 |
8.9%
|
|
| 6 | 41 |
15.8%
|
|
| 7 | 33 |
12.7%
|
|
| 8 | 18 |
6.9%
|
|
| 9 | 14 |
5.4%
|
|
| 10 | Very effective | 10 |
3.9%
|
| 11 | Don't know | 41 |
15.8%
|
| Sysmiss | 1 |