| Value | Category | Cases | |
|---|---|---|---|
| -99 | 5 |
1.3%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 2 |
0.5%
|
|
| 3 | 4 |
1%
|
|
| 4 | 8 |
2.1%
|
|
| 5 | 27 |
7.1%
|
|
| 6 | 33 |
8.6%
|
|
| 7 | 48 |
12.6%
|
|
| 8 | 68 |
17.8%
|
|
| 9 | 21 |
5.5%
|
|
| 10 | Very effective | 16 |
4.2%
|
| 11 | Don't know | 148 |
38.7%
|
| Sysmiss | 47 |