| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.9%
|
| 2 | 3 |
1.4%
|
|
| 3 | 6 |
2.8%
|
|
| 4 | 7 |
3.3%
|
|
| 5 | 17 |
7.9%
|
|
| 6 | 30 |
14%
|
|
| 7 | 15 |
7%
|
|
| 8 | 17 |
7.9%
|
|
| 9 | 25 |
11.7%
|
|
| 10 | Very effective | 21 |
9.8%
|
| 11 | Don't know | 69 |
32.2%
|
| Sysmiss | 6 |