| Value | Category | Cases | |
|---|---|---|---|
| -99 | 1 |
0.3%
|
|
| 1 | Not effective at all | 3 |
1%
|
| 2 | 2 |
0.7%
|
|
| 3 | 20 |
6.8%
|
|
| 4 | 16 |
5.5%
|
|
| 5 | 56 |
19.2%
|
|
| 6 | 29 |
9.9%
|
|
| 7 | 22 |
7.5%
|
|
| 8 | 12 |
4.1%
|
|
| 9 | 8 |
2.7%
|
|
| 10 | Very effective | 2 |
0.7%
|
| 11 | Don't know | 121 |
41.4%
|
| Sysmiss | 9 |