| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
1.9%
|
| 2 | 5 |
3.2%
|
|
| 3 | 14 |
9.1%
|
|
| 4 | 11 |
7.1%
|
|
| 5 | 20 |
13%
|
|
| 6 | 15 |
9.7%
|
|
| 7 | 23 |
14.9%
|
|
| 8 | 28 |
18.2%
|
|
| 9 | 22 |
14.3%
|
|
| 10 | Very effective | 13 |
8.4%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 239 |