| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.4%
|
|
| 1 | Not effective at all | 12 |
4.4%
|
| 2 | 5 |
1.8%
|
|
| 3 | 11 |
4%
|
|
| 4 | 15 |
5.5%
|
|
| 5 | 27 |
9.9%
|
|
| 6 | 19 |
7%
|
|
| 7 | 14 |
5.1%
|
|
| 8 | 15 |
5.5%
|
|
| 9 | 4 |
1.5%
|
|
| 10 | Very effective | 4 |
1.5%
|
| 11 | Don't know | 146 |
53.5%
|
| Sysmiss | 22 |