| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.5%
|
|
| 1 | Not effective at all | 3 |
1.4%
|
| 2 | 8 |
3.8%
|
|
| 3 | 16 |
7.7%
|
|
| 4 | 14 |
6.7%
|
|
| 5 | 30 |
14.4%
|
|
| 6 | 28 |
13.4%
|
|
| 7 | 33 |
15.8%
|
|
| 8 | 26 |
12.4%
|
|
| 9 | 12 |
5.7%
|
|
| 10 | Very effective | 2 |
1%
|
| 11 | N/A | 1 |
0.5%
|
| 12 | Don't know | 35 |
16.7%
|
| Sysmiss | 16 |