| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
1.2%
|
| 2 | 3 |
0.9%
|
|
| 3 | 0 |
0%
|
|
| 4 | 8 |
2.4%
|
|
| 5 | 14 |
4.2%
|
|
| 6 | 29 |
8.7%
|
|
| 7 | 61 |
18.3%
|
|
| 8 | 64 |
19.2%
|
|
| 9 | 26 |
7.8%
|
|
| 10 | Very effective | 14 |
4.2%
|
| 11 | Don't know | 110 |
33%
|
| Sysmiss | 7 |