| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
1.5%
|
|
| 1 | Not effective at all | 4 |
2.1%
|
| 2 | 8 |
4.1%
|
|
| 3 | 13 |
6.7%
|
|
| 4 | 17 |
8.7%
|
|
| 5 | 27 |
13.8%
|
|
| 6 | 21 |
10.8%
|
|
| 7 | 26 |
13.3%
|
|
| 8 | 11 |
5.6%
|
|
| 9 | 13 |
6.7%
|
|
| 10 | Very effective | 5 |
2.6%
|
| 11 | Don't know | 47 |
24.1%
|
| Sysmiss | 30 |