| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.1%
|
| 2 | 2 |
0.8%
|
|
| 3 | 5 |
1.9%
|
|
| 4 | 14 |
5.3%
|
|
| 5 | 63 |
23.7%
|
|
| 6 | 52 |
19.5%
|
|
| 7 | 54 |
20.3%
|
|
| 8 | 28 |
10.5%
|
|
| 9 | 25 |
9.4%
|
|
| 10 | Very effective | 20 |
7.5%
|
| 11 | Don't know | 42 | |
| Sysmiss | 88 |