| Value | Category | Cases | |
|---|---|---|---|
| 1 | Own preparation | 14287 |
88.8%
|
| 2 | Bought | 1548 |
9.6%
|
| 3 | Received for free | 256 |
1.6%
|
| 4 | Other source | 1 |
0%
|
| Sysmiss | 3873 |