| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 6 |
2.1%
|
|
| 3 | 14 |
4.9%
|
|
| 4 | 24 |
8.4%
|
|
| 5 | 59 |
20.7%
|
|
| 6 | 51 |
17.9%
|
|
| 7 | 46 |
16.1%
|
|
| 8 | 39 |
13.7%
|
|
| 9 | 23 |
8.1%
|
|
| 10 | Very effective | 21 |
7.4%
|
| 11 | Don't know | 22 | |
| Sysmiss | 89 |