| Value | Category | Cases | |
|---|---|---|---|
| -99 | 15 |
4%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 7 |
1.9%
|
|
| 3 | 7 |
1.9%
|
|
| 4 | 7 |
1.9%
|
|
| 5 | 34 |
9%
|
|
| 6 | 41 |
10.9%
|
|
| 7 | 49 |
13%
|
|
| 8 | 66 |
17.5%
|
|
| 9 | 25 |
6.6%
|
|
| 10 | Very effective | 12 |
3.2%
|
| 11 | Don't know | 112 |
29.7%
|
| Sysmiss | 7 |