| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
1.2%
|
|
| 1 | Not effective at all | 11 |
6.4%
|
| 2 | 10 |
5.8%
|
|
| 3 | 7 |
4.1%
|
|
| 4 | 5 |
2.9%
|
|
| 5 | 17 |
9.9%
|
|
| 6 | 8 |
4.7%
|
|
| 7 | 19 |
11%
|
|
| 8 | 24 |
14%
|
|
| 9 | 15 |
8.7%
|
|
| 10 | Very effective | 31 |
18%
|
| 11 | Don't know | 23 |
13.4%
|
| Sysmiss | 3 |