| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
4.4%
|
| 2 | 6 |
5.3%
|
|
| 3 | 12 |
10.5%
|
|
| 4 | 15 |
13.2%
|
|
| 5 | 11 |
9.6%
|
|
| 6 | 17 |
14.9%
|
|
| 7 | 17 |
14.9%
|
|
| 8 | 14 |
12.3%
|
|
| 9 | 6 |
5.3%
|
|
| 10 | Very effective | 11 |
9.6%
|
| 11 | Don't know | 88 | |
| Sysmiss | 36 |