| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
9.1%
|
| 2 | 4 |
9.1%
|
|
| 4 | 1 |
2.3%
|
|
| 6 | 6 |
13.6%
|
|
| 7 | 11 |
25%
|
|
| 8 | 9 |
20.5%
|
|
| 9 | 7 |
15.9%
|
|
| 10 | Very effective | 2 |
4.5%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 120 |