| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
2.4%
|
| 2 | 9 |
2.7%
|
|
| 3 | 9 |
2.7%
|
|
| 4 | 16 |
4.9%
|
|
| 5 | 31 |
9.5%
|
|
| 6 | 51 |
15.5%
|
|
| 7 | 52 |
15.9%
|
|
| 8 | 30 |
9.1%
|
|
| 9 | 20 |
6.1%
|
|
| 10 | Very effective | 24 |
7.3%
|
| 11 | Don't know | 78 |
23.8%
|
| Sysmiss | 26 |