| Value | Category | Cases | |
|---|---|---|---|
| -99 | 5 |
1.3%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 2 |
0.5%
|
|
| 3 | 4 |
1%
|
|
| 4 | 6 |
1.6%
|
|
| 5 | 19 |
5%
|
|
| 6 | 27 |
7%
|
|
| 7 | 46 |
12%
|
|
| 8 | 59 |
15.4%
|
|
| 9 | 35 |
9.1%
|
|
| 10 | Very effective | 15 |
3.9%
|
| 11 | Don't know | 163 |
42.6%
|
| Sysmiss | 46 |