| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.3%
|
|
| 1 | Not effective at all | 18 |
5.9%
|
| 2 | 13 |
4.3%
|
|
| 3 | 12 |
3.9%
|
|
| 4 | 13 |
4.3%
|
|
| 5 | 40 |
13.2%
|
|
| 6 | 30 |
9.9%
|
|
| 7 | 33 |
10.9%
|
|
| 8 | 27 |
8.9%
|
|
| 9 | 20 |
6.6%
|
|
| 10 | Very effective | 11 |
3.6%
|
| 11 | Don't know | 86 |
28.3%
|
| Sysmiss | 3 |