| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 11 |
3.5%
|
| 2 | 7 |
2.2%
|
|
| 3 | 12 |
3.8%
|
|
| 4 | 16 |
5.1%
|
|
| 5 | 27 |
8.7%
|
|
| 6 | 24 |
7.7%
|
|
| 7 | 27 |
8.7%
|
|
| 8 | 19 |
6.1%
|
|
| 9 | 23 |
7.4%
|
|
| 10 | Very effective | 93 |
29.8%
|
| 11 | Don't know | 53 |
17%
|
| Sysmiss | 14 |