| Value | Category | Cases | |
|---|---|---|---|
| -99 | 10 |
2.6%
|
|
| 1 | Not effective at all | 1 |
0.3%
|
| 2 | 4 |
1%
|
|
| 3 | 3 |
0.8%
|
|
| 4 | 10 |
2.6%
|
|
| 5 | 29 |
7.6%
|
|
| 6 | 33 |
8.7%
|
|
| 7 | 58 |
15.2%
|
|
| 8 | 67 |
17.6%
|
|
| 9 | 41 |
10.8%
|
|
| 10 | Very effective | 15 |
3.9%
|
| 11 | Don't know | 110 |
28.9%
|
| Sysmiss | 3 |