| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
2.5%
|
| 2 | 1 |
0.6%
|
|
| 3 | 3 |
1.8%
|
|
| 4 | 13 |
8%
|
|
| 5 | 21 |
12.9%
|
|
| 6 | 23 |
14.1%
|
|
| 7 | 43 |
26.4%
|
|
| 8 | 27 |
16.6%
|
|
| 9 | 16 |
9.8%
|
|
| 10 | Very effective | 12 |
7.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 87 |