| Value | Category | Cases | |
|---|---|---|---|
| -99 | 7 |
1.8%
|
|
| 1 | Not effective at all | 6 |
1.6%
|
| 2 | 3 |
0.8%
|
|
| 3 | 5 |
1.3%
|
|
| 4 | 5 |
1.3%
|
|
| 5 | 19 |
5%
|
|
| 6 | 40 |
10.5%
|
|
| 7 | 51 |
13.4%
|
|
| 8 | 66 |
17.3%
|
|
| 9 | 32 |
8.4%
|
|
| 10 | Very effective | 17 |
4.5%
|
| 11 | Don't know | 130 |
34.1%
|
| Sysmiss | 3 |