| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
7.5%
|
| 2 | 1 |
1.9%
|
|
| 3 | 4 |
7.5%
|
|
| 4 | 4 |
7.5%
|
|
| 5 | 8 |
15.1%
|
|
| 6 | 6 |
11.3%
|
|
| 7 | 12 |
22.6%
|
|
| 8 | 7 |
13.2%
|
|
| 9 | 6 |
11.3%
|
|
| 10 | Very effective | 1 |
1.9%
|
| -99 | 9 | ||
| 11 | Don't know | 80 | |
| Sysmiss | 18 |