| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
3.2%
|
| 4 | 2 |
6.5%
|
|
| 5 | 10 |
32.3%
|
|
| 6 | 6 |
19.4%
|
|
| 7 | 4 |
12.9%
|
|
| 8 | 4 |
12.9%
|
|
| 9 | 3 |
9.7%
|
|
| 10 | Very effective | 1 |
3.2%
|
| 11 | Don't know | 50 | |
| Sysmiss | 25 |