| Value | Category | Cases | |
|---|---|---|---|
| -99 | 6 |
2.2%
|
|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 5 |
1.8%
|
|
| 3 | 7 |
2.5%
|
|
| 4 | 4 |
1.4%
|
|
| 5 | 13 |
4.7%
|
|
| 6 | 25 |
9%
|
|
| 7 | 46 |
16.5%
|
|
| 8 | 40 |
14.4%
|
|
| 9 | 28 |
10.1%
|
|
| 10 | Very effective | 25 |
9%
|
| 11 | Don't know | 78 |
28.1%
|
| Sysmiss | 1 |