| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 22 |
7.5%
|
| 2 | 11 |
3.7%
|
|
| 3 | 15 |
5.1%
|
|
| 4 | 25 |
8.5%
|
|
| 5 | 32 |
10.9%
|
|
| 6 | 31 |
10.5%
|
|
| 7 | 40 |
13.6%
|
|
| 8 | 30 |
10.2%
|
|
| 9 | 31 |
10.5%
|
|
| 10 | Very effective | 57 |
19.4%
|
| 11 | Don't know | 109 | |
| Sysmiss | 27 |