| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.4%
|
| 3 | 12 |
4.2%
|
|
| 4 | 10 |
3.5%
|
|
| 5 | 23 |
8.1%
|
|
| 6 | 48 |
17%
|
|
| 7 | 59 |
20.8%
|
|
| 8 | 70 |
24.7%
|
|
| 9 | 42 |
14.8%
|
|
| 10 | Very effective | 18 |
6.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 92 |