| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1%
|
| 2 | 5 |
2.4%
|
|
| 3 | 3 |
1.4%
|
|
| 4 | 8 |
3.8%
|
|
| 5 | 17 |
8.2%
|
|
| 6 | 25 |
12%
|
|
| 7 | 47 |
22.6%
|
|
| 8 | 69 |
33.2%
|
|
| 9 | 29 |
13.9%
|
|
| 10 | Very effective | 3 |
1.4%
|
| 11 | Don't know | 140 | |
| Sysmiss | 12 |