| Value | Category | Cases | |
|---|---|---|---|
| -99 | 8 |
2.1%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 3 |
0.8%
|
|
| 3 | 5 |
1.3%
|
|
| 4 | 2 |
0.5%
|
|
| 5 | 16 |
4.2%
|
|
| 6 | 29 |
7.6%
|
|
| 7 | 57 |
15%
|
|
| 8 | 84 |
22.1%
|
|
| 9 | 46 |
12.1%
|
|
| 10 | Very effective | 29 |
7.6%
|
| 11 | Don't know | 99 |
26.1%
|
| Sysmiss | 49 |