| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.4%
|
| 2 | 1 |
1.4%
|
|
| 3 | 1 |
1.4%
|
|
| 4 | 1 |
1.4%
|
|
| 5 | 10 |
13.9%
|
|
| 6 | 13 |
18.1%
|
|
| 7 | 9 |
12.5%
|
|
| 8 | 15 |
20.8%
|
|
| 9 | 14 |
19.4%
|
|
| 10 | Very effective | 7 |
9.7%
|
| -99 | 14 | ||
| 11 | Don't know | 81 | |
| Sysmiss | 16 |