| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.9%
|
| 2 | 6 |
2.9%
|
|
| 3 | 9 |
4.3%
|
|
| 4 | 6 |
2.9%
|
|
| 5 | 25 |
12%
|
|
| 6 | 18 |
8.6%
|
|
| 7 | 22 |
10.5%
|
|
| 8 | 35 |
16.7%
|
|
| 9 | 19 |
9.1%
|
|
| 10 | Very effective | 10 |
4.8%
|
| 11 | Don't know | 55 |
26.3%
|
| Sysmiss | 16 |