| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.6%
|
| 2 | 3 |
1.6%
|
|
| 3 | 0 |
0%
|
|
| 4 | 3 |
1.6%
|
|
| 5 | 10 |
5.3%
|
|
| 6 | 18 |
9.6%
|
|
| 7 | 28 |
15%
|
|
| 8 | 17 |
9.1%
|
|
| 9 | 8 |
4.3%
|
|
| 10 | Very effective | 6 |
3.2%
|
| 11 | Don't know | 91 |
48.7%
|
| Sysmiss | 16 |