| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 6 |
4%
|
|
| 3 | 6 |
4%
|
|
| 4 | 14 |
9.3%
|
|
| 5 | 31 |
20.5%
|
|
| 6 | 46 |
30.5%
|
|
| 7 | 16 |
10.6%
|
|
| 8 | 15 |
9.9%
|
|
| 9 | 12 |
7.9%
|
|
| 10 | Very effective | 4 |
2.6%
|
| 11 | Don't know | 20 | |
| Sysmiss | 32 |