| Value | Category | Cases | |
|---|---|---|---|
| -99 | 5 |
1.9%
|
|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 6 |
2.2%
|
|
| 3 | 9 |
3.3%
|
|
| 4 | 14 |
5.2%
|
|
| 5 | 20 |
7.4%
|
|
| 6 | 20 |
7.4%
|
|
| 7 | 38 |
14.1%
|
|
| 8 | 50 |
18.5%
|
|
| 9 | 19 |
7%
|
|
| 10 | Very effective | 25 |
9.3%
|
| 11 | Don't know | 63 |
23.3%
|
| Sysmiss | 9 |