| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
1%
|
|
| 1 | Not effective at all | 3 |
2.9%
|
| 2 | 2 |
1.9%
|
|
| 3 | 6 |
5.8%
|
|
| 4 | 6 |
5.8%
|
|
| 5 | 13 |
12.6%
|
|
| 6 | 7 |
6.8%
|
|
| 7 | 11 |
10.7%
|
|
| 8 | 5 |
4.9%
|
|
| 9 | 3 |
2.9%
|
|
| 10 | Very effective | 1 |
1%
|
| 11 | Don't know | 45 |
43.7%
|
| Sysmiss | 4 |