| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 31 |
9.6%
|
| 2 | 38 |
11.7%
|
|
| 3 | 48 |
14.8%
|
|
| 4 | 78 |
24.1%
|
|
| 5 | 67 |
20.7%
|
|
| 6 | 32 |
9.9%
|
|
| 7 | 11 |
3.4%
|
|
| 8 | 10 |
3.1%
|
|
| 9 | 1 |
0.3%
|
|
| 10 | Very effective | 8 |
2.5%
|
| 11 | Don't know | 151 | |
| Sysmiss | 3 |