| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
3%
|
| 2 | 4 |
4%
|
|
| 3 | 5 |
5%
|
|
| 4 | 8 |
8%
|
|
| 5 | 20 |
20%
|
|
| 6 | 21 |
21%
|
|
| 7 | 13 |
13%
|
|
| 8 | 16 |
16%
|
|
| 9 | 6 |
6%
|
|
| 10 | Very effective | 4 |
4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 91 |