| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
2.4%
|
| 2 | 7 |
2.1%
|
|
| 3 | 11 |
3.3%
|
|
| 4 | 21 |
6.3%
|
|
| 5 | 25 |
7.5%
|
|
| 6 | 40 |
12%
|
|
| 7 | 33 |
9.9%
|
|
| 8 | 15 |
4.5%
|
|
| 9 | 7 |
2.1%
|
|
| 10 | Very effective | 19 |
5.7%
|
| 11 | Don't know | 148 |
44.3%
|
| Sysmiss | 20 |