| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 4 |
4.3%
|
| 2 | 6 |
6.5%
|
|
| 3 | 4 |
4.3%
|
|
| 4 | 6 |
6.5%
|
|
| 5 | 18 |
19.6%
|
|
| 6 | 6 |
6.5%
|
|
| 7 | 16 |
17.4%
|
|
| 8 | 12 |
13%
|
|
| 9 | 7 |
7.6%
|
|
| 10 | Very effective | 13 |
14.1%
|
| 11 | Don't know | 0 |
0%
|
| Sysmiss | 276 |