| Value | Category | Cases | |
|---|---|---|---|
| -99 | 2 |
0.7%
|
|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 3 |
1.1%
|
|
| 3 | 13 |
4.9%
|
|
| 4 | 15 |
5.6%
|
|
| 5 | 33 |
12.3%
|
|
| 6 | 36 |
13.4%
|
|
| 7 | 40 |
14.9%
|
|
| 8 | 48 |
17.9%
|
|
| 9 | 22 |
8.2%
|
|
| 10 | Very effective | 26 |
9.7%
|
| 11 | Don't know | 29 |
10.8%
|
| Sysmiss | 3 |