| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.3%
|
|
| 1 | Not effective at all | 4 |
1.2%
|
| 2 | 2 |
0.6%
|
|
| 3 | 2 |
0.6%
|
|
| 4 | 7 |
2.1%
|
|
| 5 | 11 |
3.3%
|
|
| 6 | 39 |
11.8%
|
|
| 7 | 46 |
13.9%
|
|
| 8 | 69 |
20.8%
|
|
| 9 | 32 |
9.7%
|
|
| 10 | Very effective | 14 |
4.2%
|
| 11 | Don't know | 104 |
31.4%
|
| Sysmiss | 9 |