| Value | Category | Cases | |
|---|---|---|---|
| -99 | 17 |
4.5%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 3 |
0.8%
|
|
| 3 | 6 |
1.6%
|
|
| 4 | 9 |
2.4%
|
|
| 5 | 26 |
6.8%
|
|
| 6 | 47 |
12.4%
|
|
| 7 | 48 |
12.6%
|
|
| 8 | 43 |
11.3%
|
|
| 9 | 38 |
10%
|
|
| 10 | Very effective | 17 |
4.5%
|
| 11 | Don't know | 124 |
32.6%
|
| Sysmiss | 4 |