| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 11 |
2.4%
|
| 2 | 16 |
3.5%
|
|
| 3 | 20 |
4.4%
|
|
| 4 | 16 |
3.5%
|
|
| 5 | 34 |
7.4%
|
|
| 6 | 40 |
8.7%
|
|
| 7 | 40 |
8.7%
|
|
| 8 | 38 |
8.3%
|
|
| 9 | 26 |
5.7%
|
|
| 10 | Very effective | 56 |
12.2%
|
| 11 | Don't know | 26 |
5.7%
|
| 12 | 136 |
29.6%
|
|
| Sysmiss | 108 |