| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 15 |
9.3%
|
| 2 | 12 |
7.4%
|
|
| 3 | 8 |
4.9%
|
|
| 4 | 10 |
6.2%
|
|
| 5 | 13 |
8%
|
|
| 6 | 19 |
11.7%
|
|
| 7 | 16 |
9.9%
|
|
| 8 | 19 |
11.7%
|
|
| 9 | 18 |
11.1%
|
|
| 10 | Very effective | 32 |
19.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 180 |