| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
1.6%
|
| 2 | 4 |
1.3%
|
|
| 3 | 9 |
2.9%
|
|
| 4 | 21 |
6.7%
|
|
| 5 | 47 |
14.9%
|
|
| 6 | 45 |
14.3%
|
|
| 7 | 60 |
19%
|
|
| 8 | 60 |
19%
|
|
| 9 | 33 |
10.5%
|
|
| 10 | Very effective | 31 |
9.8%
|
| -99 | 68 | ||
| 11 | Don't know | 125 | |
| Sysmiss | 149 |