| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.9%
|
|
| 1 | Not effective at all | 3 |
1.4%
|
| 2 | 2 |
0.9%
|
|
| 3 | 6 |
2.8%
|
|
| 4 | 2 |
0.9%
|
|
| 5 | 29 |
13.3%
|
|
| 6 | 20 |
9.2%
|
|
| 7 | 18 |
8.3%
|
|
| 8 | 25 |
11.5%
|
|
| 9 | 11 |
5%
|
|
| 10 | Very effective | 27 |
12.4%
|
| 11 | Don't know | 73 |
33.5%
|
| Sysmiss | 3 |