| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.4%
|
| 2 | 4 |
2.8%
|
|
| 3 | 5 |
3.5%
|
|
| 4 | 3 |
2.1%
|
|
| 5 | 8 |
5.6%
|
|
| 6 | 12 |
8.4%
|
|
| 7 | 24 |
16.8%
|
|
| 8 | 8 |
5.6%
|
|
| 9 | 5 |
3.5%
|
|
| 10 | Very effective | 3 |
2.1%
|
| 11 | Don't know | 69 |
48.3%
|
| Sysmiss | 6 |