| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.4%
|
| 2 | 20 |
3.8%
|
|
| 3 | 43 |
8.2%
|
|
| 4 | 60 |
11.4%
|
|
| 5 | 122 |
23.2%
|
|
| 6 | 105 |
20%
|
|
| 7 | 83 |
15.8%
|
|
| 8 | 53 |
10.1%
|
|
| 9 | 27 |
5.1%
|
|
| 10 | Very effective | 10 |
1.9%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 38 |