| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 1 |
1.1%
|
| 2 | 2 |
2.3%
|
|
| 3 | 5 |
5.7%
|
|
| 4 | 12 |
13.6%
|
|
| 5 | 18 |
20.5%
|
|
| 6 | 15 |
17%
|
|
| 7 | 11 |
12.5%
|
|
| 8 | 12 |
13.6%
|
|
| 9 | 8 |
9.1%
|
|
| 10 | Very effective | 4 |
4.5%
|
| 11 | Don't know | 98 | |
| Sysmiss | 36 |