| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
7.7%
|
| 2 | 4 |
3.8%
|
|
| 3 | 6 |
5.8%
|
|
| 4 | 4 |
3.8%
|
|
| 5 | 12 |
11.5%
|
|
| 6 | 13 |
12.5%
|
|
| 7 | 15 |
14.4%
|
|
| 8 | 13 |
12.5%
|
|
| 9 | 11 |
10.6%
|
|
| 10 | Very effective | 18 |
17.3%
|
| -99 | 18 | ||
| 11 | Don't know | 60 | |
| Sysmiss | 22 |