| Value | Category | Cases | |
|---|---|---|---|
| 1 | Scientifically tested | 0 |
0%
|
| 2 | Own experience | 4122 |
99.3%
|
| 3 | Other person | 27 |
0.7%
|
| 4 | Other, specify | 0 |
0%
|
| Sysmiss | 1 |