| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 7 |
2.8%
|
|
| 3 | 5 |
2%
|
|
| 4 | 16 |
6.4%
|
|
| 5 | 27 |
10.8%
|
|
| 6 | 33 |
13.1%
|
|
| 7 | 59 |
23.5%
|
|
| 8 | 49 |
19.5%
|
|
| 9 | 25 |
10%
|
|
| 10 | Very effective | 29 |
11.6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 189 |