| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 2 |
1.3%
|
| 2 | 2 |
1.3%
|
|
| 3 | 8 |
5.1%
|
|
| 4 | 5 |
3.2%
|
|
| 5 | 36 |
22.9%
|
|
| 6 | 34 |
21.7%
|
|
| 7 | 28 |
17.8%
|
|
| 8 | 24 |
15.3%
|
|
| 9 | 12 |
7.6%
|
|
| 10 | Very effective | 6 |
3.8%
|
| 11 | Don't know | 15 | |
| Sysmiss | 31 |