| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.7%
|
| 2 | 3 |
2%
|
|
| 3 | 4 |
2.7%
|
|
| 4 | 5 |
3.4%
|
|
| 5 | 6 |
4.1%
|
|
| 6 | 5 |
3.4%
|
|
| 7 | 12 |
8.2%
|
|
| 8 | 21 |
14.3%
|
|
| 9 | 8 |
5.4%
|
|
| 10 | Very effective | 5 |
3.4%
|
| 11 | Don't know | 77 |
52.4%
|
| Sysmiss | 10 |