| Value | Category | Cases | |
|---|---|---|---|
| -99 | 8 |
3.4%
|
|
| 1 | Not effective at all | 4 |
1.7%
|
| 2 | 3 |
1.3%
|
|
| 3 | 5 |
2.1%
|
|
| 4 | 14 |
6%
|
|
| 5 | 16 |
6.8%
|
|
| 6 | 24 |
10.2%
|
|
| 7 | 25 |
10.6%
|
|
| 8 | 32 |
13.6%
|
|
| 9 | 18 |
7.7%
|
|
| 10 | Very effective | 15 |
6.4%
|
| 11 | Don't know | 71 |
30.2%
|
| Sysmiss | 2 |