| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 16 |
3.5%
|
| 2 | 10 |
2.2%
|
|
| 3 | 22 |
4.8%
|
|
| 4 | 22 |
4.8%
|
|
| 5 | 40 |
8.7%
|
|
| 6 | 40 |
8.7%
|
|
| 7 | 46 |
10%
|
|
| 8 | 31 |
6.7%
|
|
| 9 | 18 |
3.9%
|
|
| 10 | Very effective | 50 |
10.8%
|
| 11 | Don't know | 27 |
5.9%
|
| 12 | 139 |
30.2%
|
|
| Sysmiss | 106 |