| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
5.9%
|
| 2 | 7 |
5.9%
|
|
| 3 | 13 |
10.9%
|
|
| 4 | 16 |
13.4%
|
|
| 5 | 18 |
15.1%
|
|
| 6 | 12 |
10.1%
|
|
| 7 | 16 |
13.4%
|
|
| 8 | 10 |
8.4%
|
|
| 9 | 10 |
8.4%
|
|
| 10 | Very effective | 10 |
8.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 138 |