| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 7 |
2.6%
|
|
| 3 | 11 |
4.1%
|
|
| 4 | 25 |
9.2%
|
|
| 5 | 55 |
20.3%
|
|
| 6 | 38 |
14%
|
|
| 7 | 39 |
14.4%
|
|
| 8 | 32 |
11.8%
|
|
| 9 | 23 |
8.5%
|
|
| 10 | Very effective | 39 |
14.4%
|
| 11 | Don't know | 35 | |
| Sysmiss | 90 |