| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
2.6%
|
|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 8 |
3.5%
|
|
| 3 | 11 |
4.8%
|
|
| 4 | 9 |
3.9%
|
|
| 5 | 25 |
10.9%
|
|
| 6 | 21 |
9.1%
|
|
| 7 | 14 |
6.1%
|
|
| 8 | 12 |
5.2%
|
|
| 9 | 7 |
3%
|
|
| 10 | Very effective | 13 |
5.7%
|
| 11 | Don't know | 103 |
44.8%
|
| Sysmiss | 7 |