| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.8%
|
| 2 | 3 |
1.3%
|
|
| 3 | 8 |
3.6%
|
|
| 4 | 9 |
4%
|
|
| 5 | 18 |
8.1%
|
|
| 6 | 36 |
16.1%
|
|
| 7 | 47 |
21.1%
|
|
| 8 | 49 |
22%
|
|
| 9 | 30 |
13.5%
|
|
| 10 | Very effective | 19 |
8.5%
|
| 11 | Don't know | 147 | |
| Sysmiss | 51 |