| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.8%
|
| 2 | 7 |
5.6%
|
|
| 4 | 10 |
8.1%
|
|
| 5 | 20 |
16.1%
|
|
| 6 | 13 |
10.5%
|
|
| 7 | 29 |
23.4%
|
|
| 8 | 18 |
14.5%
|
|
| 9 | 14 |
11.3%
|
|
| 10 | Very effective | 12 |
9.7%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 155 |