| Value | Category | Cases | |
|---|---|---|---|
| -99 | 9 |
2.4%
|
|
| 1 | Not effective at all | 4 |
1%
|
| 2 | 2 |
0.5%
|
|
| 3 | 7 |
1.8%
|
|
| 4 | 8 |
2.1%
|
|
| 5 | 34 |
8.9%
|
|
| 6 | 44 |
11.5%
|
|
| 7 | 58 |
15.2%
|
|
| 8 | 48 |
12.6%
|
|
| 9 | 30 |
7.9%
|
|
| 10 | Very effective | 11 |
2.9%
|
| 11 | Don't know | 126 |
33.1%
|
| Sysmiss | 3 |