| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.4%
|
| 3 | 1 |
1.4%
|
|
| 5 | 7 |
9.7%
|
|
| 6 | 11 |
15.3%
|
|
| 7 | 12 |
16.7%
|
|
| 8 | 21 |
29.2%
|
|
| 9 | 11 |
15.3%
|
|
| 10 | Very effective | 8 |
11.1%
|
| -99 | 9 | ||
| 11 | Don't know | 69 | |
| Sysmiss | 7 |