| Value | Category | Cases | |
|---|---|---|---|
| 1 | Not effective at all | 5 |
2.3%
|
| 2 | 2 |
0.9%
|
|
| 3 | 3 |
1.4%
|
|
| 4 | 9 |
4.1%
|
|
| 5 | 34 |
15.6%
|
|
| 6 | 21 |
9.6%
|
|
| 7 | 16 |
7.3%
|
|
| 8 | 18 |
8.3%
|
|
| 9 | 7 |
3.2%
|
|
| 10 | Very effective | 20 |
9.2%
|
| 11 | Don't know | 83 |
38.1%
|
| Sysmiss | 3 |