| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 4 |
3.2%
|
|
| 3 | 3 |
2.4%
|
|
| 4 | 10 |
8%
|
|
| 5 | 15 |
12%
|
|
| 6 | 22 |
17.6%
|
|
| 7 | 26 |
20.8%
|
|
| 8 | 18 |
14.4%
|
|
| 9 | 16 |
12.8%
|
|
| 10 | Very effective | 10 |
8%
|
| 11 | Don't know | 95 | |
| Sysmiss | 33 |