| Value | Category | Cases | |
|---|---|---|---|
| -99 | 5 |
1.9%
|
|
| 1 | Not effective at all | 12 |
4.7%
|
| 2 | 12 |
4.7%
|
|
| 3 | 20 |
7.8%
|
|
| 4 | 27 |
10.5%
|
|
| 5 | 27 |
10.5%
|
|
| 6 | 24 |
9.3%
|
|
| 7 | 29 |
11.2%
|
|
| 8 | 29 |
11.2%
|
|
| 9 | 19 |
7.4%
|
|
| 10 | Very effective | 16 |
6.2%
|
| 11 | Don't know | 38 |
14.7%
|
| Sysmiss | 2 |