| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
1.1%
|
|
| 1 | Not effective at all | 3 |
1.1%
|
| 2 | 7 |
2.5%
|
|
| 3 | 9 |
3.2%
|
|
| 4 | 13 |
4.7%
|
|
| 5 | 18 |
6.5%
|
|
| 6 | 19 |
6.8%
|
|
| 7 | 32 |
11.5%
|
|
| 8 | 27 |
9.7%
|
|
| 9 | 21 |
7.6%
|
|
| 10 | Very effective | 20 |
7.2%
|
| 11 | Don't know | 106 |
38.1%
|
| Sysmiss | 1 |