| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.9%
|
| 2 | 4 |
1.9%
|
|
| 3 | 6 |
2.8%
|
|
| 4 | 4 |
1.9%
|
|
| 5 | 9 |
4.2%
|
|
| 6 | 10 |
4.7%
|
|
| 7 | 20 |
9.4%
|
|
| 8 | 25 |
11.8%
|
|
| 9 | 7 |
3.3%
|
|
| 10 | Very effective | 9 |
4.2%
|
| 11 | Don't know | 114 |
53.8%
|
| Sysmiss | 13 |