| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 1 |
0.3%
|
|
| 3 | 7 |
1.8%
|
|
| 4 | 6 |
1.6%
|
|
| 5 | 21 |
5.5%
|
|
| 6 | 33 |
8.6%
|
|
| 7 | 46 |
12%
|
|
| 8 | 59 |
15.4%
|
|
| 9 | 30 |
7.8%
|
|
| 10 | Very effective | 14 |
3.7%
|
| 11 | Don't know | 160 |
41.8%
|
| Sysmiss | 46 |