| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
1.5%
|
|
| 1 | Not effective at all | 6 |
2.9%
|
| 2 | 8 |
3.9%
|
|
| 3 | 14 |
6.8%
|
|
| 4 | 15 |
7.3%
|
|
| 5 | 35 |
17.1%
|
|
| 6 | 25 |
12.2%
|
|
| 7 | 34 |
16.6%
|
|
| 8 | 18 |
8.8%
|
|
| 9 | 7 |
3.4%
|
|
| 10 | Very effective | 3 |
1.5%
|
| 11 | Don't know | 37 |
18%
|
| Sysmiss | 20 |