| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 8 |
3.1%
|
| 2 | 6 |
2.3%
|
|
| 3 | 13 |
5%
|
|
| 4 | 12 |
4.7%
|
|
| 5 | 20 |
7.8%
|
|
| 6 | 29 |
11.2%
|
|
| 7 | 43 |
16.7%
|
|
| 8 | 59 |
22.9%
|
|
| 9 | 48 |
18.6%
|
|
| 10 | Very effective | 20 |
7.8%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 133 |