| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
1.9%
|
| 2 | 5 |
1.6%
|
|
| 3 | 14 |
4.5%
|
|
| 4 | 19 |
6.1%
|
|
| 5 | 40 |
12.9%
|
|
| 6 | 31 |
10%
|
|
| 7 | 31 |
10%
|
|
| 8 | 27 |
8.7%
|
|
| 9 | 13 |
4.2%
|
|
| 10 | Very effective | 4 |
1.3%
|
| 11 | Don't know | 120 |
38.7%
|
| Sysmiss | 58 |