| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
2.5%
|
| 2 | 3 |
1.1%
|
|
| 3 | 5 |
1.8%
|
|
| 4 | 18 |
6.3%
|
|
| 5 | 28 |
9.9%
|
|
| 6 | 14 |
4.9%
|
|
| 7 | 22 |
7.7%
|
|
| 8 | 23 |
8.1%
|
|
| 9 | 9 |
3.2%
|
|
| 10 | Very effective | 7 |
2.5%
|
| 11 | Don't know | 148 |
52.1%
|
| Sysmiss | 19 |