| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.9%
|
| 2 | 2 |
1%
|
|
| 3 | 6 |
2.9%
|
|
| 4 | 8 |
3.8%
|
|
| 5 | 16 |
7.7%
|
|
| 6 | 17 |
8.2%
|
|
| 7 | 29 |
13.9%
|
|
| 8 | 32 |
15.4%
|
|
| 9 | 33 |
15.9%
|
|
| 10 | Very effective | 61 |
29.3%
|
| -99 | 11 | ||
| 11 | Don't know | 80 | |
| Sysmiss | 53 |