| Value | Category | Cases | |
|---|---|---|---|
| 1 | They are less harmful | 300 |
10.4%
|
| 2 | They are more harmful | 180 |
6.3%
|
| 3 | There is no difference | 628 |
21.8%
|
| 4 | I don't know | 1770 |
61.5%
|
| Sysmiss | 28 |