| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.3%
|
|
| 1 | Not effective at all | 7 |
1.1%
|
| 2 | 8 |
1.3%
|
|
| 3 | 16 |
2.6%
|
|
| 4 | 29 |
4.7%
|
|
| 5 | 70 |
11.4%
|
|
| 6 | 90 |
14.7%
|
|
| 7 | 86 |
14%
|
|
| 8 | 83 |
13.5%
|
|
| 9 | 48 |
7.8%
|
|
| 10 | Very effective | 28 |
4.6%
|
| 11 | Don't know | 146 |
23.8%
|
| Sysmiss | 11 |