| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 4 |
1.4%
|
|
| 3 | 11 |
3.7%
|
|
| 4 | 18 |
6.1%
|
|
| 5 | 45 |
15.3%
|
|
| 6 | 41 |
13.9%
|
|
| 7 | 40 |
13.6%
|
|
| 8 | 29 |
9.8%
|
|
| 9 | 9 |
3.1%
|
|
| 10 | Very effective | 10 |
3.4%
|
| 11 | Don't know | 86 |
29.2%
|
| Sysmiss | 6 |