| Value | Category | Cases | |
|---|---|---|---|
| -99 | 3 |
1.1%
|
|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 7 |
2.7%
|
|
| 3 | 14 |
5.3%
|
|
| 4 | 26 |
9.8%
|
|
| 5 | 36 |
13.6%
|
|
| 6 | 46 |
17.4%
|
|
| 7 | 30 |
11.4%
|
|
| 8 | 20 |
7.6%
|
|
| 9 | 16 |
6.1%
|
|
| 10 | Very effective | 11 |
4.2%
|
| 11 | Don't know | 54 |
20.5%
|
| Sysmiss | 7 |