| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 7 |
5.3%
|
| 2 | 4 |
3.1%
|
|
| 3 | 7 |
5.3%
|
|
| 4 | 8 |
6.1%
|
|
| 5 | 29 |
22.1%
|
|
| 6 | 13 |
9.9%
|
|
| 7 | 23 |
17.6%
|
|
| 8 | 15 |
11.5%
|
|
| 9 | 13 |
9.9%
|
|
| 10 | Very effective | 12 |
9.2%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 237 |