| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
4.3%
|
| 3 | 6 |
6.4%
|
|
| 4 | 4 |
4.3%
|
|
| 5 | 10 |
10.6%
|
|
| 6 | 19 |
20.2%
|
|
| 7 | 25 |
26.6%
|
|
| 8 | 17 |
18.1%
|
|
| 9 | 6 |
6.4%
|
|
| 10 | Very effective | 3 |
3.2%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 54 |