| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
0.8%
|
|
| 1 | Not effective at all | 3 |
0.8%
|
| 2 | 2 |
0.5%
|
|
| 3 | 0 |
0%
|
|
| 4 | 5 |
1.3%
|
|
| 5 | 28 |
7.3%
|
|
| 6 | 24 |
6.3%
|
|
| 7 | 54 |
14.1%
|
|
| 8 | 65 |
17%
|
|
| 9 | 31 |
8.1%
|
|
| 10 | Very effective | 11 |
2.9%
|
| 11 | Don't know | 157 |
41%
|
| Sysmiss | 46 |