| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.1%
|
| 2 | 3 |
1.6%
|
|
| 3 | 4 |
2.2%
|
|
| 4 | 7 |
3.8%
|
|
| 5 | 16 |
8.6%
|
|
| 6 | 14 |
7.6%
|
|
| 7 | 9 |
4.9%
|
|
| 8 | 9 |
4.9%
|
|
| 9 | 3 |
1.6%
|
|
| 10 | Very effective | 2 |
1.1%
|
| 11 | Don't know | 116 |
62.7%
|
| Sysmiss | 18 |