| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 3 |
2.1%
|
| 2 | 4 |
2.9%
|
|
| 3 | 11 |
7.9%
|
|
| 4 | 6 |
4.3%
|
|
| 5 | 27 |
19.3%
|
|
| 6 | 7 |
5%
|
|
| 7 | 23 |
16.4%
|
|
| 8 | 29 |
20.7%
|
|
| 9 | 17 |
12.1%
|
|
| 10 | Very effective | 13 |
9.3%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 139 |