| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
3.1%
|
| 2 | 9 |
3.5%
|
|
| 3 | 15 |
5.8%
|
|
| 4 | 23 |
8.9%
|
|
| 5 | 42 |
16.2%
|
|
| 6 | 32 |
12.4%
|
|
| 7 | 41 |
15.8%
|
|
| 8 | 35 |
13.5%
|
|
| 9 | 12 |
4.6%
|
|
| 10 | Very effective | 30 |
11.6%
|
| 11 | Don't know | 12 |
4.6%
|
| Sysmiss | 1 |