| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.1%
|
| 2 | 3 |
1.6%
|
|
| 3 | 1 |
0.5%
|
|
| 4 | 7 |
3.8%
|
|
| 5 | 27 |
14.7%
|
|
| 6 | 30 |
16.3%
|
|
| 7 | 32 |
17.4%
|
|
| 8 | 40 |
21.7%
|
|
| 9 | 21 |
11.4%
|
|
| 10 | Very effective | 21 |
11.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 66 |