| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.8%
|
| 2 | 3 |
1.8%
|
|
| 3 | 9 |
5.3%
|
|
| 4 | 10 |
5.9%
|
|
| 5 | 15 |
8.8%
|
|
| 6 | 25 |
14.7%
|
|
| 7 | 18 |
10.6%
|
|
| 8 | 19 |
11.2%
|
|
| 9 | 5 |
2.9%
|
|
| 10 | Very effective | 5 |
2.9%
|
| 11 | Don't know | 58 |
34.1%
|
| Sysmiss | 16 |