| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.8%
|
| 2 | 14 |
5.5%
|
|
| 3 | 8 |
3.2%
|
|
| 4 | 15 |
5.9%
|
|
| 5 | 61 |
24.1%
|
|
| 6 | 48 |
19%
|
|
| 7 | 52 |
20.6%
|
|
| 8 | 22 |
8.7%
|
|
| 9 | 12 |
4.7%
|
|
| 10 | Very effective | 19 |
7.5%
|
| 11 | Don't know | 69 | |
| Sysmiss | 74 |