| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.7%
|
|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 3 |
1.1%
|
|
| 3 | 8 |
3%
|
|
| 4 | 5 |
1.9%
|
|
| 5 | 26 |
9.7%
|
|
| 6 | 34 |
12.7%
|
|
| 7 | 54 |
20.2%
|
|
| 8 | 52 |
19.5%
|
|
| 9 | 29 |
10.9%
|
|
| 10 | Very effective | 33 |
12.4%
|
| 11 | Don't know | 20 |
7.5%
|
| Sysmiss | 4 |