| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.3%
|
|
| 1 | Not effective at all | 4 |
1.2%
|
| 2 | 1 |
0.3%
|
|
| 3 | 0 |
0%
|
|
| 4 | 5 |
1.5%
|
|
| 5 | 17 |
5.1%
|
|
| 6 | 21 |
6.3%
|
|
| 7 | 70 |
21%
|
|
| 8 | 66 |
19.8%
|
|
| 9 | 34 |
10.2%
|
|
| 10 | Very effective | 13 |
3.9%
|
| 11 | Don't know | 101 |
30.3%
|
| Sysmiss | 7 |