| Value | Category | Cases | |
|---|---|---|---|
| -99 | 12 |
3.2%
|
|
| 1 | Not effective at all | 3 |
0.8%
|
| 2 | 6 |
1.6%
|
|
| 3 | 6 |
1.6%
|
|
| 4 | 6 |
1.6%
|
|
| 5 | 29 |
7.8%
|
|
| 6 | 32 |
8.6%
|
|
| 7 | 57 |
15.2%
|
|
| 8 | 45 |
12%
|
|
| 9 | 34 |
9.1%
|
|
| 10 | Very effective | 25 |
6.7%
|
| 11 | Don't know | 119 |
31.8%
|
| Sysmiss | 10 |