| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.9%
|
| 2 | 6 |
3.7%
|
|
| 3 | 10 |
6.2%
|
|
| 4 | 4 |
2.5%
|
|
| 5 | 11 |
6.8%
|
|
| 6 | 23 |
14.3%
|
|
| 7 | 25 |
15.5%
|
|
| 8 | 37 |
23%
|
|
| 9 | 25 |
15.5%
|
|
| 10 | Very effective | 17 |
10.6%
|
| -99 | 13 | ||
| 11 | Don't know | 55 | |
| Sysmiss | 25 |