| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.3%
|
|
| 1 | Not effective at all | 5 |
1.7%
|
| 2 | 7 |
2.4%
|
|
| 3 | 13 |
4.4%
|
|
| 4 | 20 |
6.8%
|
|
| 5 | 46 |
15.6%
|
|
| 6 | 18 |
6.1%
|
|
| 7 | 20 |
6.8%
|
|
| 8 | 16 |
5.4%
|
|
| 9 | 7 |
2.4%
|
|
| 10 | Very effective | 6 |
2%
|
| 11 | Don't know | 136 |
46.1%
|
| Sysmiss | 6 |