| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
3.1%
|
| 2 | 4 |
1.6%
|
|
| 3 | 2 |
0.8%
|
|
| 4 | 11 |
4.3%
|
|
| 5 | 21 |
8.1%
|
|
| 6 | 16 |
6.2%
|
|
| 7 | 20 |
7.8%
|
|
| 8 | 12 |
4.7%
|
|
| 9 | 12 |
4.7%
|
|
| 10 | Very effective | 22 |
8.5%
|
| 11 | Don't know | 130 |
50.4%
|
| Sysmiss | 35 |