| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.9%
|
| 2 | 1 |
1.9%
|
|
| 3 | 2 |
3.8%
|
|
| 4 | 5 |
9.6%
|
|
| 5 | 10 |
19.2%
|
|
| 6 | 8 |
15.4%
|
|
| 7 | 13 |
25%
|
|
| 8 | 8 |
15.4%
|
|
| 9 | 2 |
3.8%
|
|
| 10 | Very effective | 2 |
3.8%
|
| -99 | 4 | ||
| 11 | Don't know | 35 | |
| Sysmiss | 18 |