| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.3%
|
| 2 | 1 |
0.8%
|
|
| 3 | 11 |
8.3%
|
|
| 4 | 12 |
9.1%
|
|
| 5 | 30 |
22.7%
|
|
| 6 | 24 |
18.2%
|
|
| 7 | 16 |
12.1%
|
|
| 8 | 20 |
15.2%
|
|
| 9 | 12 |
9.1%
|
|
| 10 | Very effective | 3 |
2.3%
|
| 11 | Don't know | 45 | |
| Sysmiss | 16 |