| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
1.7%
|
| 2 | 7 |
1.5%
|
|
| 3 | 12 |
2.6%
|
|
| 4 | 17 |
3.7%
|
|
| 5 | 34 |
7.3%
|
|
| 6 | 28 |
6%
|
|
| 7 | 24 |
5.2%
|
|
| 8 | 32 |
6.9%
|
|
| 9 | 14 |
3%
|
|
| 10 | Very effective | 59 |
12.7%
|
| 11 | Don't know | 230 |
49.5%
|
| Sysmiss | 102 |