| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
0.7%
|
| 2 | 4 |
0.7%
|
|
| 3 | 19 |
3.1%
|
|
| 4 | 18 |
3%
|
|
| 5 | 31 |
5.1%
|
|
| 6 | 45 |
7.4%
|
|
| 7 | 66 |
10.9%
|
|
| 8 | 59 |
9.7%
|
|
| 9 | 54 |
8.9%
|
|
| 10 | Very effective | 44 |
7.3%
|
| 11 | Don't know | 214 |
35.3%
|
| Sysmiss | 48 |
7.9%
|