| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.3%
|
|
| 1 | Not effective at all | 2 |
0.7%
|
| 2 | 2 |
0.7%
|
|
| 3 | 8 |
2.7%
|
|
| 4 | 12 |
4.1%
|
|
| 5 | 34 |
11.6%
|
|
| 6 | 42 |
14.3%
|
|
| 7 | 49 |
16.7%
|
|
| 8 | 26 |
8.8%
|
|
| 9 | 16 |
5.4%
|
|
| 10 | Very effective | 6 |
2%
|
| 11 | Don't know | 96 |
32.7%
|
| Sysmiss | 7 |