| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 0 |
0%
|
| 2 | 1 |
2.3%
|
|
| 3 | 1 |
2.3%
|
|
| 4 | 6 |
13.6%
|
|
| 5 | 4 |
9.1%
|
|
| 6 | 9 |
20.5%
|
|
| 7 | 11 |
25%
|
|
| 8 | 10 |
22.7%
|
|
| 9 | 2 |
4.5%
|
|
| 10 | Very effective | 0 |
0%
|
| -99 | 4 | ||
| 11 | Don't know | 43 | |
| Sysmiss | 18 |