| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.5%
|
| 2 | 6 |
1.8%
|
|
| 3 | 11 |
3.2%
|
|
| 4 | 20 |
5.9%
|
|
| 5 | 43 |
12.6%
|
|
| 6 | 44 |
12.9%
|
|
| 7 | 54 |
15.9%
|
|
| 8 | 33 |
9.7%
|
|
| 9 | 27 |
7.9%
|
|
| 10 | Very effective | 53 |
15.6%
|
| 11 | Don't know | 44 |
12.9%
|
| Sysmiss | 14 |