| Value | Category | Cases | |
|---|---|---|---|
| -99 | 9 |
3.2%
|
|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 4 |
1.4%
|
|
| 3 | 6 |
2.2%
|
|
| 4 | 12 |
4.3%
|
|
| 5 | 22 |
7.9%
|
|
| 6 | 23 |
8.3%
|
|
| 7 | 33 |
11.9%
|
|
| 8 | 40 |
14.4%
|
|
| 9 | 22 |
7.9%
|
|
| 10 | Very effective | 19 |
6.8%
|
| 11 | Don't know | 86 |
30.9%
|
| Sysmiss | 1 |