| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
4.9%
|
| 2 | 5 |
6.1%
|
|
| 3 | 3 |
3.7%
|
|
| 4 | 6 |
7.3%
|
|
| 5 | 11 |
13.4%
|
|
| 6 | 10 |
12.2%
|
|
| 7 | 12 |
14.6%
|
|
| 8 | 17 |
20.7%
|
|
| 9 | 7 |
8.5%
|
|
| 10 | Very effective | 7 |
8.5%
|
| -99 | 13 | ||
| 11 | Don't know | 72 | |
| Sysmiss | 16 |