| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
0.9%
|
| 2 | 5 |
1.1%
|
|
| 3 | 9 |
2.1%
|
|
| 4 | 12 |
2.7%
|
|
| 5 | 30 |
6.8%
|
|
| 6 | 31 |
7.1%
|
|
| 7 | 34 |
7.8%
|
|
| 8 | 36 |
8.2%
|
|
| 9 | 34 |
7.8%
|
|
| 10 | Very effective | 74 |
16.9%
|
| 11 | Don't know | 169 |
38.6%
|
| Sysmiss | 129 |