| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.4%
|
|
| 1 | Not effective at all | 3 |
1.3%
|
| 2 | 8 |
3.6%
|
|
| 3 | 6 |
2.7%
|
|
| 4 | 11 |
4.9%
|
|
| 5 | 24 |
10.7%
|
|
| 6 | 18 |
8%
|
|
| 7 | 16 |
7.1%
|
|
| 8 | 21 |
9.3%
|
|
| 9 | 10 |
4.4%
|
|
| 10 | Very effective | 9 |
4%
|
| 11 | Don't know | 98 |
43.6%
|
| Sysmiss | 12 |