| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 4 |
3.2%
|
|
| 3 | 5 |
4%
|
|
| 4 | 9 |
7.2%
|
|
| 5 | 27 |
21.6%
|
|
| 6 | 22 |
17.6%
|
|
| 7 | 20 |
16%
|
|
| 8 | 19 |
15.2%
|
|
| 9 | 12 |
9.6%
|
|
| 10 | Very effective | 6 |
4.8%
|
| 11 | Don't know | 64 | |
| Sysmiss | 33 |