| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.5%
|
|
| 1 | Not effective at all | 3 |
1.4%
|
| 2 | 2 |
0.9%
|
|
| 3 | 5 |
2.3%
|
|
| 4 | 5 |
2.3%
|
|
| 5 | 32 |
14.7%
|
|
| 6 | 14 |
6.5%
|
|
| 7 | 31 |
14.3%
|
|
| 8 | 28 |
12.9%
|
|
| 9 | 20 |
9.2%
|
|
| 10 | Very effective | 19 |
8.8%
|
| 11 | Don't know | 57 |
26.3%
|
| Sysmiss | 4 |