| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
3.4%
|
| 2 | 4 |
2.3%
|
|
| 3 | 2 |
1.1%
|
|
| 4 | 11 |
6.3%
|
|
| 5 | 19 |
10.8%
|
|
| 6 | 16 |
9.1%
|
|
| 7 | 9 |
5.1%
|
|
| 8 | 23 |
13.1%
|
|
| 9 | 9 |
5.1%
|
|
| 10 | Very effective | 6 |
3.4%
|
| 11 | Don't know | 71 |
40.3%
|
| Sysmiss | 4 |