| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 2 |
0.9%
|
|
| 4 | 3 |
1.4%
|
|
| 5 | 18 |
8.5%
|
|
| 6 | 25 |
11.8%
|
|
| 7 | 53 |
25.1%
|
|
| 8 | 72 |
34.1%
|
|
| 9 | 31 |
14.7%
|
|
| 10 | Very effective | 7 |
3.3%
|
| 11 | Don't know | 137 | |
| Sysmiss | 12 |