| Value | Category | Cases | |
|---|---|---|---|
| -99 | 8 |
2.9%
|
|
| 1 | Not effective at all | 1 |
0.4%
|
| 2 | 5 |
1.8%
|
|
| 3 | 7 |
2.5%
|
|
| 4 | 8 |
2.9%
|
|
| 5 | 15 |
5.4%
|
|
| 6 | 27 |
9.7%
|
|
| 7 | 39 |
14%
|
|
| 8 | 30 |
10.8%
|
|
| 9 | 23 |
8.3%
|
|
| 10 | Very effective | 26 |
9.4%
|
| 11 | Don't know | 89 |
32%
|
| Sysmiss | 1 |