| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
4.7%
|
| 2 | 3 |
3.5%
|
|
| 3 | 4 |
4.7%
|
|
| 4 | 4 |
4.7%
|
|
| 5 | 20 |
23.5%
|
|
| 6 | 9 |
10.6%
|
|
| 7 | 8 |
9.4%
|
|
| 8 | 13 |
15.3%
|
|
| 9 | 11 |
12.9%
|
|
| 10 | Very effective | 9 |
10.6%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 121 |