| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
6.8%
|
| 2 | 1 |
1%
|
|
| 3 | 8 |
7.8%
|
|
| 4 | 13 |
12.6%
|
|
| 5 | 17 |
16.5%
|
|
| 6 | 12 |
11.7%
|
|
| 7 | 14 |
13.6%
|
|
| 8 | 8 |
7.8%
|
|
| 9 | 7 |
6.8%
|
|
| 10 | Very effective | 16 |
15.5%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 154 |