| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1.4%
|
|
| 1 | Not effective at all | 9 |
3.1%
|
| 2 | 10 |
3.5%
|
|
| 3 | 14 |
4.9%
|
|
| 4 | 21 |
7.3%
|
|
| 5 | 36 |
12.5%
|
|
| 6 | 30 |
10.4%
|
|
| 7 | 40 |
13.9%
|
|
| 8 | 32 |
11.1%
|
|
| 9 | 25 |
8.7%
|
|
| 10 | Very effective | 14 |
4.9%
|
| 11 | Don't know | 53 |
18.4%
|
| Sysmiss | 19 |