| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 6 |
2.6%
|
| 2 | 3 |
1.3%
|
|
| 3 | 8 |
3.5%
|
|
| 4 | 13 |
5.7%
|
|
| 5 | 17 |
7.4%
|
|
| 6 | 20 |
8.7%
|
|
| 7 | 31 |
13.5%
|
|
| 8 | 51 |
22.2%
|
|
| 9 | 26 |
11.3%
|
|
| 10 | Very effective | 12 |
5.2%
|
| 11 | Don't know | 43 |
18.7%
|
| Sysmiss | 18 |